How to buy a mattress online (when you can't visit a showroom)

Key takeaways
Here's the no-nonsense summary of what you need to know before you shop for a mattress online:
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Focus on feel, not marketing: The only thing that matters is how the mattress keeps your spine aligned and eliminates pressure points. Ignore claims like "cooling gel" or "5-zone support," which are often meaningless.
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Choose springs for your weight: This is the most important factor. The spring tension does 90% of the support work. A mattress optimised for a 65kg person will fail for a 110kg person.
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Choose for longer use: Demand to know the foam density (polyfoam should be 35 kg/m3 or higher) or choose natural latex mattresses for 3-4x longer lifespan and durability.
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Check your bed base: 80% of "dipping" issues I see are caused by flexible bed slats, not the mattress itself. Before you buy another mattress, check the base first.
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Buy adjustability, not a "perfect" pick: You cannot pick the perfect mattress from a webpage. Choose a modular mattress with a zipper that allows you to swap components, like comfort layers or springs, during the trial period.
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Read the negative reviews: Don't just look at star ratings. Go to ProductReview, sort by "lowest rating," and see how the company solves problems when things go wrong. This tells you everything about their trial period and warranty support.
Part 1: Understanding why most online mattress purchases go wrong
The core problem: You're buying the wrong thing
When you buy online, you're typically focused on:
- The brand name
- The sale price, like 50% during EOFY sale periods
- Marketing claims ("cooling gel memory foam," "5-zone support")
- Star ratings
Here's what you should actually focus on: When the lights go out at night, all of the bullshit goes away, and you are left only with how it feels. Focus on this.
The mattress needs to do ONE thing: keep your spine in neutral alignment while eliminating pressure at your hips and shoulders. That's it. Everything else is noise.
Why "best mattress" reviews are useless
Asking "what's the best mattress?" is like asking strangers on the internet what size jeans you should buy. They don't know your body. There is no standard for mattress firmness across the industry. A "medium" from one brand feels completely different from a "medium mattress" from another.
I keep different latex feels, spring tensions and cushioning setups in my showroom. People with the same body weight can still prefer a different surface feel. Different mattress types suit different sleepers, which is why finding the right mattress requires understanding your sleep style and body shape.
Part 2: The critical factors that actually matter
1. Spring tension for your body weight
This is the #1 factor in mattress comfort, and it's almost never discussed when you buy a mattress online.
The principle: If the pocket springs are too soft for your body weight, you'll sink through the foam layers and end up in a hammock. Too firm? The springs won't compress enough, and you'll experience pressure points that disrupt sleep quality.
What should happen: When you have the right springs and ideal firmness, your hips and shoulders should sink into the mattress while your torso stays elevated. This keeps your spine in its natural S-curve and helps distribute body weight evenly for a restful night's sleep.
Industry secret: I can have two identical spring mattresses side-by-side. The only difference is that the spring wire is 0.1mm thicker in one. They feel completely different, one medium firm, one firm. The gauge of wire is the biggest predictor of pressure distribution and overall support.
Why online mattresses get this wrong: Mass-market mattress-in-a-box brands typically use one spring tension for all sizes. They optimise for manufacturing efficiency, not for your body. Whether it's a queen-size mattress or a king mattress, "soft" or "firm," the springs inside are often the same tension.
2. Material quality: What's inside actually matters
From pulling apart hundreds of failed mattresses, I can tell you: it's never the springs that dip. It's always the foam.
The three foam types
Polyfoam (plastic with bubbles):
- Cheapest option, dips faster than latex
- Density matters: Low density = dips in 1-3 years. High density (35 kg/m3+) = 5-7 years
- Koala mattress uses their own proprietary polyfoam
Memory Foam (plastic with bubbles, denser):
- Heat-sensitive (softer in summer, firmer in winter)
- Tempur uses very high density (85 kg/m3) but stores 70x more heat than air
- Slowly compresses through the night (your body gradually sinks)
- Popular in memory foam mattresses, but it can impact sleep quality for hot sleepers
Natural Latex (tree sap with bubbles):
- Most expensive but offers exceptional durability
- 3-4x longer lifespan than polyfoam
- Bouncier feel with better pressure relief
- Sets and doesn't move through the night
- Quality mattresses often use natural latex for comfort
Critical warning: Many online "latex mattresses" use only 1-2cm of latex mixed with polyfoam, or worse, use "Chinese latex", which is 70% plastic (synthetic latex). Real latex is 97% natural rubber.
How to verify: Look for certifications:
- GOLS (Global Organic Latex Standard): 95%+ organic latex
- Oeko-Tex Standard 100: No harmful substances
- Thickness matters: 5cm minimum for genuine latex
3. Bed case compatibility
This is huge and rarely mentioned: 80% of the "dipping mattress" issues I see are actually caused by flexible bed slats, not the mattress itself.
The problem: Before you spend hundreds of dollars on a new mattress, check your bed base first. You may not need a new mattress; it could be the base causing problems. If you can flex the slats with your fingers, imagine how much they flex under your full weight. Even quality mattresses will fail on poor bed bases.
The test: Put your mattress on the floor. Feel better? Don't replace your current mattress yet. Your slats are the problem.
Part 3: How to actually get it right when buying online
Strategy 1: Choose adjustability over "perfect" selection
The Reality: You can't predict how a mattress will feel after 30 nights from 5 minutes of research. Even 5 minutes lying on it in a showroom doesn't tell you how your body will feel after a full night's sleep.
The Solution: Don't try to choose perfectly. Choose a mattress system that can be adjusted based on your sleeping position and preferences.
What to look for:
- Modular/zippered design that allows layer replacement
- Multiple spring tensions selected for the comfort layer and body weight
- Trial of 90+ days minimum (ours is 7 months)
- Free firmness swaps during the trial
- Clear adjustment instructions (phone/video support)
Why this works: At Ausbeds, we offer 2 free firmness swaps during the 7-month comfort trial. We can swap springs, latex layers, comfort layers, whatever's needed to achieve spinal alignment and reduce pressure points. It's not about picking perfectly; it's about having a path to the right configuration.
Example: a customer can start with springs chosen for their weight. If the surface still feels wrong after settling in, we can swap the latex during the trial without replacing the complete mattress.
Strategy 2: Understand what the trial really means
Most brands offer a 100-night window, but not all trials are the same. At Ausbeds, we offer 7 months because we'd rather help you adjust than take the mattress back. When you're shopping online for a new mattress, consider these red flags.
Red flags:
- "Free trial period", but returns cost $150+ in shipping
- "Full refund", but you pay original shipping both ways (you're out $300+)
- No adjustment support during trial
- Vague return process ("contact customer service")
Green flags:
- Clear return fee structure stated upfront
- Firmness swaps offered before full return
- Phone/WhatsApp support for troubleshooting
- Extensions available if you're actively working on adjustments
- Company arranges pickup (you're not dealing with freight companies)
At Ausbeds, for example:
- 7 months trial (from date of delivery)
- 2 free firmness swaps included
- We diagnose issues: springs too firm/soft, base problems, foam preferences
- Delivery is $2/km in Sydney and from $190 interstate (Melbourne, Brisbane, Canberra). Use the delivery calculator to check your exact cost
- Return cost: Same as delivery fee + $90 processing (stated upfront)
Strategy 3: Research the company's problem-solving track record
How to evaluate:
Check negative reviews specifically:
- Go to ProductReview.com.au or Google Reviews
- Sort by LOWEST rating first
- Read what happens when things go wrong
- Look at the company's responses
What you're looking for:
- Do they solve the problem or deflect?
- Are responses human or corporate boilerplate?
- Do they honour warranties and trial windows?
- How quickly do they respond?
Red flag responses:
- "You didn't follow care instructions"
- "That's normal break-in"
- "You need to prove it with measurements"
- "Contact our warranty department"
Green flag responses:
- "Come in and we'll swap the layer"
- "We'll drive out and fix it"
- "Let's diagnose over the phone"
- Personal responses from the owner/team
Strategy 4: Ask the right questions before buying
Email or call the company BEFORE you buy. Their answers tell you everything:
Question 1: "I'm [X]kg and sleep on my [side/back/stomach]. What spring tension do you recommend?"
- Good answer: Specific recommendation with reasoning
- Bad answer: "Our mattress works for everyone" or vague marketing speak
Question 2: "What happens if it's too firm/soft after 2 weeks?"
- Good answer: "We swap [specific component] at [specific cost]"
- Bad answer: "You have 100 nights to decide" (doesn't answer the question)
Question 3: "What density is your foam/latex, and what certifications do you have?"
- Good answer: Specific numbers (e.g., "35 kg/m3 polyfoam, GOLS certified latex")
- Bad answer: "Premium quality materials" or "We can't disclose that"
Question 4: "Can you show me what's inside? Can I see a layer breakdown?"
- Good answer: Photos, diagrams, or video showing actual layers
- Bad answer: "It's proprietary" or marketing descriptions only
Question 5: "What's your return rate, and what are the most common adjustments?"
- Good answer: Honest stats ("About 5%, mostly spring tension adjustments")
- Bad answer: Defensiveness or "We don't track that"
Part 4: The Ausbeds system (how we solve the online problem)
Let me be transparent about how we've built Ausbeds to solve these exact issues:
The latex and body-weight matching system
Step 1: Choose the mattress, then the springs
Pick the mattress by how you sleep and the feel you like: the Cloud has soft latex for a plush surface, and the Aurora has medium latex for a balanced, responsive one. Then choose the springs for your weight. On the Cloud, choose medium springs below 80kg and firm springs from 80kg. On the Aurora, choose medium springs below 100kg and firm springs from 100kg.
Firm latex and soft springs are request-only options that need a conversation with us first.
Step 2: At-home adjustability. Every Ausbeds mattress gives you 2 firmness settings without ordering anything:
- Soft setting, as delivered: the soft side of the spring unit faces up for the most contouring
- Firm setting: flip the spring unit so the white-mesh side faces up for around 15% firmer spring tension
Step 3: Free firmness swaps (7 months). Need to go outside your range? We ship new components:
- Comfort firmness change: Free component + delivery fee
- Spring tension change: Free component + service visit fee
- You get 2 free swaps to find your ideal firmness
Step 4: After the trial, your mattress is still adjustable. You can swap components at any time, forever. No single component costs more than 25% of your original mattress price. You just pay the component cost plus a service visit fee.
The modular design
Everything unzips and separates:
- Top layer: Removable soft or medium latex (firm latex by request)
- Micro springs: Removable layer (Aurora/Cloud only)
- Main springs: Flippable between a soft side and a firm side
Why this matters for online buying: You're not stuck with one mattress configuration. You can evolve the mattress as your body changes, partners change, or preferences change.
The Ausbeds trial design
7 months - the longest trial period out there. Here's how you can use it:
- Month 2-3: First firmness swap if needed
- Month 4-5: Second firmness swap if needed
- Month 6-7: Final adjustments for complex cases
Why longer? Some people need 6-8 weeks to adapt to proper spinal alignment if they've been sleeping on a dipped mattress for years. We don't rush you.
Part 5: Red flags to avoid when buying online
Marketing red flags
- "50% OFF SALE!" The mattress industry runs perpetual sales. If it's always 50% off, that's the real price. We don't do sales at Ausbeds; our prices are our prices year-round.
- "Cooling gel technology" / "Anti-gravity foam" / "NASA-developed" More foam = more heat. Period. You want less foam, not better marketing. Focus on mattresses designed with breathability in mind.
- "5-zone support" or "7-zone comfort" Zones sound technical. But women have bigger hips and smaller shoulders. Men have bigger shoulders and smaller hips. They need opposite zoning. I removed zones from my mattresses, and return rates dropped because they suit different body types better.
- Vague material descriptions
- "Premium memory foam" (what density?)
- "Natural latex blend" (what %? Where from?)
- "High-quality springs" (what tension? What wire gauge?)
- Comparison tables showing they're "#1" in everything. Nobody is best at everything. There are trade-offs. If they can't admit downsides, they're not being honest. Different kinds of mattresses serve different needs.
Business model red flags
- 30% of the sale price is advertising. Casper (US bed-in-a-box) went public and revealed that 30% of the mattress cost was digital ad spend. That's $450 of a $1,500 mattress going to Facebook ads, not materials.
- No visible manufacturer or factory. Who makes it? Where? Can you visit? This is common for mattress-in-a-box and big retail brands. If the answer is "China" and you can't see it, you're buying blind.
- Incentivised reviews. Bottom of review: "Received 10% discount for this review." They're flooding out negative reviews with paid positives. Check independent sites for honest customer satisfaction data.
- No phone number, only contact forms. If they won't talk to you, they won't help you when things go wrong.
Product red flags
- All-foam mattress (no springs). Foam-only mattresses use 40-50kg of foam. That's a lot of heat storage and degradation risk. Springs provide 90% of support, and foam should just prevent you from feeling the springs. Spring mattresses with quality foam layers offer better long-term performance.
- Mattress-in-a-box vacuum sealed for months. Real latex should never be compressed for long periods. If it arrives compressed and takes days to expand, it's either polyfoam or low-quality material.
- No layer breakdown or material specs. If they won't tell you what's inside, it's because it's cheap foam they don't want you researching. Quality mattresses come with transparent specifications.
- "One firmness fits all." Unless they consider the comfort layer and body weight when selecting spring tension, they're guessing. Different mattress types are needed for different sleepers.
Part 6: What happens when it goes wrong (and how to fix it)
Problem 1: Mattress feels too soft after 2 weeks
Likely causes:
- Springs too soft for your weight
- Foam breaking in (polyfoam softens 10-15% in the first month)
- Flexible bed slats underneath
Diagnostic process:
- Put the mattress on the floor: Better? It's your base
- Flip the spring unit to the white-mesh side: Better? It's spring support
- Still too soft? Need firmer springs
Ausbeds solution: We swap to firmer springs (free component during trial). Sydney customers: we drive out. Interstate: we ship, you install.
What most companies do: "Give it 6 weeks to break in" (doesn't solve spring tension issues)
Problem 2: Pressure points at hips/shoulders
Likely causes:
- Springs too firm for your weight
- Not enough contouring in the comfort layer
- Wrong sleeping position for that firmness
Diagnostic process:
- Are you a side sleeper? You need more cushioning and pressure relief
- Check spring tension against your weight
- Check if the latex/foam comfort layer is too thin
Ausbeds solution:
- Move from firm to medium springs
- Change to a softer latex, for example from the Aurora to the Cloud
- On a Cooper, replace the foam layer with micro springs for more contouring
What most companies do: "Try a topper" (doesn't fix spring tension mismatch)
Problem 3: Mattress sleeping hot
Likely causes:
- Too much foam thickness
- Memory foam (stores more heat than latex/polyfoam)
- Synthetic cover material
- Poor bedroom ventilation
Solutions:
- Reduce foam thickness (we use the minimum necessary)
- Switch to natural materials like latex (better breathability)
- Use natural fibre covers (cotton, Tencel)
- Improve room airflow
- Avoid electric blanket use which can compound heat issues
Reality check: No mattress technology can overcome poor bedroom ventilation. If you're hot, reduce foam first and ensure your room has adequate airflow.
Problem 4: Dipping after 6-12 months
Likely causes:
- Low-density polyfoam (under 30 kg/m3)
- Spring tension too soft for the weight
- Sitting on the bed regularly (concentrates weight)
- Flexible bed slats
Prevention when buying:
- Ask for foam density specs (35+ kg/m3 for polyfoam)
- Choose latex over polyfoam for longevity
- Match spring tension to weight
- Verify slat quality on bed bases
Ausbeds approach: We tell customers upfront: "Foam wears like tyres. If it dips abnormally fast, unzip it, bring us the layer, we'll replace it." We built the entire factory system around easy layer replacement, ensuring long-term durability.
Part 8: The uncomfortable truth about online mattress buying
You're taking a risk no matter what
Buying a mattress you haven't tried is always a gamble. Even with our latex-and-body-weight matching system, adjustability, and 7-month trial window, about 5% of customers return mattresses. Why? They're the 20% outliers where personal preference overrides weight predictions.
There is no way to guarantee a right fit from an online purchase alone. Anyone claiming otherwise is lying.
What you can do:
- Understand your sleep style and body shape needs
- Minimise risk through adjustability
- Choose brands that support you through the trial
- Don't expect perfection, expect a path to perfection
The showroom would be better (though it's not always possible)
Advantages of showroom visits:
- Feel the actual product
- Try multiple firmness options side by side
- Ask questions in person
- See inside the mattress (if they let you)
- Compare mattress options directly, in person
Disadvantages:
- 5 minutes lying down does not equal 8 hours sleeping
- Showroom pressure affects judgment
- Different clothing affects feel
- Can't test your actual sleeping position properly
The reality: Even showroom customers need adjustments. At Ausbeds, showroom customers use the trial period just as much as online customers. The mattress feels different after 30 nights than after 5 minutes. Getting a good night's sleep consistently requires time to adapt.
Why I built Ausbeds this way
I spent 10 years as a chef before making mattresses. In kitchens, we have "mise en place", everything in its place, ready when needed. I applied that to mattresses:
- All components are pre-made and in stock
- Replacement parts ready immediately
- Customer calls: we ship the same day
- No waiting for overseas production
The goal: Remove the risk from online buying by adjusting fast, easily, and affordably.
Better solution: Adjust it, don't trash it. That's why everything's modular, and they are mattresses designed for customisation.
Final recommendations: Your action plan for a (near) perfect mattress
Step 1: Determine your non-negotiables
Choose your must-haves from the list below:
- Trial period minimum 90 days (prefer 3-9 months)
- Return process clearly stated with costs upfront
- Contact phone number (not just email forms)
- Material specs disclosed (foam density, latex %, certifications)
- Spring tension options for different weights
- Modular/adjustable design
- Free firmness swaps during trial
- Australian made
- Natural latex option
- Video installation/adjustment guides
- Range of firmness preferences available
Step 2: Research 3-5 brands
For each brand, check:
- ProductReview.com.au negative reviews
- Google reviews sorted by lowest rating
- Reddit/Whirlpool forum discussions
- Company response to problems
- Owner/founder involvement (family business vs. corporate)
Shortlist criteria:
- Return rate under 10%
- Transparent material specs
- Active problem-solving in reviews
- Bodyweight guidance provided
Step 3: Contact them before buying
Ask the questions from Part 3. Evaluate:
- Response time (same day vs. 3 days)
- Answer quality (specific vs. vague)
- Helpfulness vs. sales pressure
- Technical knowledge demonstrated
Step 4: Make your purchase
What to order:
- Spring tension you choose for your weight (ask for the recommendation)
- Firmness option: Use the recommended latex-and-body-weight starting point rather than guessing firmer or softer
- Size: Get bigger if space allows (King Singles, Queens over Doubles)
- Protector: Always use a mattress protector (stains void warranties)
Document everything:
- Order confirmation
- Trial end date
- Return process screenshot
- Firmness swap policy
Step 5: The first 30 days
Week 1-2: Break-in period
- Some discomfort is normal (body adapting)
- Note specific issues: too soft/firm, pain points, heat
- Don't panic. The trial period exists for this
Week 3-4: Decision point
- Still uncomfortable? Contact the company immediately
- Request specific firmness swap or adjustment
- Don't wait until the end of your trial to ask for help
Red flag: The company says "give it more time" without offering solutions. Good companies diagnose and fix.
Step 6: Use your trial period properly
Common mistakes:
- Waiting until the last week to report problems
- Not trying DIY adjustments first
- Expecting perfection immediately
- Not checking your base
Best practice:
- Contact the company within 2 weeks if there are issues
- Try suggested adjustments with guidance
- Give each adjustment 1-2 weeks
- Document everything (photos of issues)
Conclusion: The mattress you can't try doesn't have to be a gamble
You can't predict a perfect fit from weight alone. But you can create a system where a perfect fit is achievable through adjustment. The mattress industry is designed around planned obsolescence. Cheap foam, no adjustability, and difficult returns. But it doesn't have to be this way.
The best online mattress purchase is one with the best safety net. Not the best initial choice, but the best path to correction when the initial choice is wrong.
At Ausbeds, we've built that safety net:
- 7-month trial
- 2 free firmness swaps
- Spring tensions chosen for your weight
- Modular design, you can adjust at home
- 10-year warranty with actual support
- Mattresses designed for Australian conditions
But even if you don't buy from us, apply these principles to whoever you buy from:
- Demand transparency on materials and construction
- Verify the trial terms include adjustment support, not just returns
- Check problem-solving track record in reviews
- Match spring tension to the comfort layer and body weight, if possible
- Choose adjustability over trying to pick perfectly
- Ensure they offer good support both physically and through customer service
The uncomfortable truth? Even visiting a showroom doesn't guarantee success. The mattress feels different after 30 nights than 5 minutes.
The comfortable truth? With the right system, you can get it right through iteration, not prediction. You can achieve a restful night's sleep and wake up refreshed when you have the support to adjust your mattress to your needs.
And that's how you shop for a mattress when you can't visit a showroom.
Frequently Asked Questions About Buying an Online Mattress
Is it cheaper to buy a mattress online?
It often looks cheaper, but you must look at the total cost of ownership. Many mainstream mattress-in-a-box brands spend up to 30% of the mattress cost on digital advertising.
A $700 mattress in a box that uses low-density foam might only last 3 years before it dips. A quality mattress that costs $2,950 but lasts 10+ years is cheaper annually. Many affordable mattresses are cheap upfront but cost you more in the long run with poor sleep and frequent replacements of your old mattress.
Is it better to buy a mattress in person or online?
Both methods have flaws. Visiting a retail store lets you feel the mattress, but 5 minutes in a showroom tells you very little about how you'll sleep for 8 hours. You're also under sales pressure. Buying online is a gamble unless you choose a company that is built to handle adjustments. The "best" method is to buy an adjustable mattress from a company that offers a long trial window (90+ days) and, most importantly, offers to swap components like springs or foam layers to get the fit right. Even my showroom customers use the trial for adjustments, because a mattress always feels different at home after 30 nights.
What is the best mattress to order online?
There is no such thing as the "best mattress". Asking this question is the main reason people make mistakes in their mattress shopping. The "best mattress" for a 110kg stomach sleeper would be a terrible mattress for a 60kg side sleeper. They need completely different support systems. Stop looking for the "best" and start looking for the "right mattress" for your weight and sleep style. The best online purchase isn't a magical one-size-fits-all mattress; it's a mattress from a company that gives you a path to get it right through adjustments.
How do I know which mattress is right for me?
You can't know the "perfect mattress" fit just from reading mattress reviews. You start by getting the fundamentals right, and the number one factor is choosing the right spring tension for your weight. This sets the foundation for proper support.
Should you buy a new mattress without trying it out?
You can, but you must be smart about it. Buying foam mattresses, especially cheap affordable mattresses, that are "one-size-fits-all" is a pure gamble. They are guessing what works for you.
If you buy a bed-in-a-box or mattress-in-a-box without trying it, you must have a safety net. This means:
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A trial that is at least 90 days long.
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A clear, upfront return policy where you know the exact cost if it fails.
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Ideally, a modular system with adjustable firmness, like a removable cover that lets you swap the foam layers.
If the company doesn't offer a path to adjust the mattress, they are just rolling the dice with your money and your sleep.
About the author

Karl owns Ausbeds. Tired of mattresses that failed too soon, he set up a Sydney workshop to make them properly: honest materials, adjustable designs. He also gives straight mattress advice on Reddit, Whirlpool and OzBargain.






