The TrueFirm Mattress only feels too firm if your body is used to a plush or medium bed, because both its Firm and Extra Firm sides are built for stable, minimal-sink support rather than a soft, sink-in feel.
Side sleepers who prefer softer support might find the Firm side firmer than they’d like, which is why TrueFirm comes as a flippable mattress instead of a single fixed feel. Flip it over to move from Firm to Extra Firm, or the other way, until you land on the side that actually suits your body.
Key Takeaways
- Flipping the TrueFirm Mattress switches you between a Firm and an Extra Firm feel, so one mattress covers two levels of support.
- Breathable latex, pocket springs and a Tencel™ cover work together to keep the surface cool and limit motion transfer between partners.
- Every mattress ships with a 100 night trial and a 15-year limited warranty, alongside recycled and certified materials.
Our How to Choose a Mattress guide covers firmness, sleeping position and body type if you want the full buying picture before you decide.
What’s Inside the TrueFirm Mattress
Three parts build the TrueFirm Mattress, a Tencel™ cover, layers of latex and foam, and a base of pocket springs. Each side gets its own cover and its own support foam, while the pocket springs sit in the middle and work for both sides at once.
The TENCEL™ Cover
Both sides wear a cover blended from Lenzing TENCEL™ and recycled polyester, cool against the skin and quick to breathe. That breathability comes from the blend itself, since its fibres pull moisture away from your body rather than trapping it against the surface.
Flip the mattress and you land on a fresh cover every time, since the Firm and Extra Firm sides carry the same fabric.
Latex and Foam Comfort Layers
Natural Dunlop latex sits close to the surface on both sides, giving the mattress its firm, springy feel straight out of the box.
Being naturally hypoallergenic, it also resists dust mites and keeps its shape well through years of use. Beneath the latex, foam layers spread your weight evenly and ease pressure at the shoulders and hips, tuned firmer on the Extra Firm side than the Firm side.
High Gauge Pocket Springs
Five zones of heavy-duty, high-gauge pocket springs anchor the middle of the mattress, wrapped individually in fabric rather than linked together like older coil designs. Each spring responds only to the weight resting directly above it, rather than pulling on the springs around it.
Our guide to innerspring vs pocket spring mattresses breaks the difference down properly. Made from zero-waste steel, the springs also tie into TrueFirm’s wider sustainability story, which we’ll get to shortly.
Firm or Extra Firm With One Flip
| Aspect | Firm Side | Extra Firm Side |
| Feel | Solid support with subtle cushioning | Stable surface with minimal give |
| Support layer | Contour Foam and Firm Support Foam | Extra Firm Support Foam |
| Best suited to | Sleepers who want structure with a touch of softness | Sleepers who want maximum stability underneath them |
Flip the TrueFirm Mattress over and you move between two distinct feels. The Firm side offers solid support with subtle cushioning, while the Extra Firm side keeps you resting on top rather than sinking in.
The whole mattress turns over as one piece, saving you the unzipping and internal rearranging other adjustable mattresses need.
The Firm Side
Contour Foam and Firm Support Foam sit beneath the latex on this side, giving you enough cushioning to feel welcoming while keeping that solid, lifted feel underneath.
Best suited to:
- Sleepers moving over from a medium or plush mattress
- Lighter to average-weight sleepers who still want a firm surface
- Anyone who wants structure with a slight give
The Extra Firm Side
Extra Firm Support Foam takes that same spot on the other side, built to hold its shape under heavier weight and keep the surface steady beneath you.
Best suited to:
- Heavier sleepers who need extra lift
- Sleepers who want minimal give underneath them
- Long-term firm-mattress sleepers who find most “firm” beds too soft
Which side you’ll prefer often comes down to personal comfort rather than one mattress being objectively better than the other.
If Firm still feels like the wrong category altogether, our best firm mattress guide rounds up the full range and what each option suits. Try the Firm side for a week, then flip it, and let your own body settle the question during your trial period.
If you’re managing a back condition or another health concern, a chat with your doctor before switching firmness levels is worth having.
Cooler Nights and Calmer Partners
Heat and partner movement are two things worth checking before buying any firm mattress, and the TrueFirm Mattress handles both with the same set of layers.
Breathable materials keep air moving through the mattress, while independently moving springs stop one sleeper’s movement from reaching the other side of the bed.
Open-Cell Latex and Breathable Springs
Dunlop latex with an open-cell structure lets air pass straight through it, rather than trapping heat the way solid foam can. Pocket springs add another layer of airflow underneath, since gaps between each spring give warm air somewhere to escape. Together with the breathable cover, these layers work to keep the surface cool through the night rather than warming up under you.
Independently Moving Pocket Springs
Pocket springs, split into five zones, move independently of each other, so weight or movement on one side stays mostly contained to that side. If your partner shifts position or gets up during the night, minimal motion should carry across to you. The same springs that adjust to your body’s shape also stop that movement from spreading across the mattress, doing double duty for a calmer night’s sleep.
Materials Chosen With the Planet in Mind
Every layer in the TrueFirm Mattress carries a sustainability choice, from a cover built partly from recycled bottles through to steel springs made without factory waste.
Recycled Polyester in the Cover
Lenzing Tencel™ and polyester make up both covers, on the Firm side and the Extra Firm side alike, and 23% of that polyester is recycled from plastic bottles rather than new material.
Zero Waste Steel Springs
Ecosa lists the pocket springs’ steel as zero-waste, one more material choice sitting alongside the mattress’s two certifications below.
Certified Foams and Fabric
Two separate certifications cover different parts of the mattress, CertiPUR-US for the foams and the Global Recycled Standard for the fabric. CertiPUR-US checks the foams for volatile organic compounds and other substances best kept out of a mattress you sleep on every night, while the Global Recycled Standard checks that the fabric’s recycled content is genuinely recycled.
Give Your Mattress a Second Life
When the TrueFirm Mattress eventually reaches the end of its life, Ecosa’s Mattress Collection and Recycling Service offers to take it back for $125, rather than leaving disposal to you. Mattresses in good condition go to charity, while the rest are broken down so materials like foam and steel can be recycled or repurposed.
For the wider picture beyond one mattress, our sustainable practices page rounds up sustainability initiatives across the whole range.
Your 100 Night Trial and 15-Year Warranty
Trying the TrueFirm Mattress comes with two safety nets built in, a 100 night trial and a 15-year limited warranty. Sleep on it for 100 nights before deciding whether to keep it. Should a refund suit you better than the mattress itself, Ecosa arranges that refund and collects the mattress for donation to one of its charity partners.
Fifteen years of coverage then protects the mattress against manufacturing faults, under the terms set out in Ecosa’s warranty policy. Being a limited warranty, it covers defects in materials and workmanship rather than general wear from years of nightly use.
Shop the TrueFirm Mattress
Bringing the TrueFirm Mattress home starts with picking a size, from Single up to Super King, with free next-day delivery in metro areas.
Signing up as an Ecosa member unlocks a discount on top of the 100 night trial and 15-year warranty already covered above. Delivery arrives in one box, complete with a handle and wheels to make moving it into the bedroom easier.
If flipping between Firm and Extra Firm sounds like the flippable mattress your current bed is missing, shop the TrueFirm Mattress and find the side that fits how you actually sleep.
Beyond TrueFirm, our full mattress range spans every firmness level, and pairing your new mattress with bedding and pillows rounds out the bedroom.