REM-Fit 500 Ortho Hybrid Mattress Review | 2025

Our testers have gone through multiple mattresses this year, and the REM-Fit 500 Ortho Hybrid has been the most comfortable by far.

Comfort, however, is subjective.

• If you love good, firm mattresses, like the Otty Hybrid, you will love the REM-Fit 500 Ortho Hybrid. It's incredibly firm, very supportive, and feels rock solid.
• However, if you prefer a little bit of squish or like a softer, gentler feel, this won't be the mattress for you. You'll likely be far more comfortable on a softer mattress like the Simba Hybrid Pro or even a more mid-level feel, like the Emma Hybrid Premium.

Our testers felt the REM-Fit 500 Ortho was a bit too firm on the first night, especially since they just moved over from a few softer mattresses, but this is to be expected.

By the second night, however, the mattress already felt a lot more comfortable - the perfect fit.

How firm is the REM-Fit 500 Ortho Hybrid mattress?

REM-Fit rates the 500 Ortho Hybrid as having firm tension, a 9 out of 10.

And we'd definitely agree, putting it at a 9 out of 10 on the Sleep Hero firmness scale.

Generally, you'd want to go for a slightly firmer mattress if you're a stomach sleeper, back sleeper, or of heavier weight, while you'd likely want to go for a slightly softer mattress if you're a side sleeper or of lighter weight.

But, one of our testers is an average-weight side sleeper with a preference for firmer mattresses, and still found the REM-Fit 500 more comfortable and supportive than some softer models.

Does the REM-Fit 500 Ortho Hybrid sleep hot?

We tested the mattress during autumn so can't directly speak to what you'd experience in the peak of summer, but, the mattress felt cooler and more breathable than a few other memory-foam-based products we've tried in similar weather conditions.

Considering the high spring count, it makes sense that the 500 Ortho offers enhanced breathability.

Springs generally allow for better airflow and, combined with open-cell foam and a thermo-regulating cover

Is the REM-Fit 500 Ortho suitable for couples?

The REM-Fit 500 is a dream for couples, and here's why:

• The exceptional support makes it well-suited to people of different builds
• It has above-average edge support, ensuring you can make use of the full width of the mattress without feeling like you're falling off
• It has almost zero motion transfer, meaning you won't feel your partner tossing and turning at night

We tested the mattress on a slatted bed frame, which generally leads to poorer edge support and higher motion transfer than what you'd experience on a divan base, so the REM-Fit's excellent performance is definitely testament to its high quality.

The REM-Fit 500 Ortho Hybrid mattress comes with free UK delivery within 1 - 3 working days.

Unlike most other bed-in-a-box brands, we were surprised to see that the mattress did not come rolled up and compressed in a box, but in a big recyclable bag.

Delivery was quick and easy, communication was great, and the delivery team was kind and helpful.

Here some need-to-knows:

• Unpacking your mattress: We didn't experience any off-gassing, but it did take a good 24 hours or so for the foams to expand fully. So if you unpack your mattress and notice it's looking wonky or not expanding, just give it time.
• Sleep trial: REM-Fit offers a competitive 200-night risk-free sleep trial, giving you the chance to try your mattress in the comfort of your own home. If it's not a perfect fit, they'll pick it up again, free of charge, and issue a full refund.
• Guarantee: You'll also benefit from a 15-year full replacement guarantee, so you can rest easy knowing your purchase is safe for years to come.

It's worth noting, again, that REM-Fit explicitly states the mattress should not be used on slatted bases where the slats are more than 10 cm apart.

In our experience, sticking to the brand guidelines on this not only ensures a better sleep but also guarantees you have a hassle-free process during any trial or warranty claims.