wowttrelax Kingsize memory foam mattress topper (7cm) for back comfort and cooling

If your mattress feels a bit “past its best”, a mattress topper can be the cheaper way to change how it feels without replacing the whole bed. This wowttrelax Kingsize topper is built around a double-layer foam approach, and it’s aimed at people who want pressure relief, a slightly cooler sleep, and a firmer feel when needed.

It’s not a miracle fix for every back problem, though. Comfort is personal, and if your base mattress is extremely worn or sagging badly, a topper can only do so much.

The essentials

This wowttrelax mattress topper is a Kingsize (150x200) 7cm thick layer designed to sit on top of your existing mattress. The key idea is a two-sided setup: one side is positioned as a softer, “zero-pressure” memory foam feel, while flipping the cover gives access to a firmer side for extra support.

The build combines memory foam with a high-density support layer, and the materials are described as including bamboo charcoal and cooling gel beads. On paper, it’s a thoughtful mix for people who want both comfort and support, rather than going for one extreme.

What to expect from the feel

The manufacturer’s description leans heavily on pressure relief. The memory foam is presented as slow-rebound with quick-release, which matters because it changes how the topper responds as you move from one position to another.

In practical terms, you can think of it like this: when you first lie down, it should gently contour to your body shape. Then when you shift position, it shouldn’t stay stuck to you for ages. That’s the kind of behaviour that can help if you wake up with that “stuck pressure” feeling.

Also, because the topper is 7cm thick, it has enough presence to noticeably alter the surface feel, rather than just acting like a very thin comfort sheet.

Cooling and moisture support

Heat build-up is one of the reasons people look for a cooling topper. Here, the memory foam is said to include gel beads intended to help regulate body temperature, while the support foam layer is described as infused with bamboo charcoal.

It’s worth keeping expectations realistic: a topper can help with comfort, but it won’t replace a cool room or suitable bedding. Still, if you often feel too warm at night, this cooling angle is at least directly built into the design.

Support that you can adjust (sort of)

One of the more interesting features is the two-sided, double-layer concept. The description suggests that if you need a firmer feel for back comfort, you can flip the cover to access the firmer side.

This is useful for people whose preferences change: for example, if your back feels better with more support on some nights than others. It’s not the same as having separate firmness zones, but it does give you a quick way to shift the feel.

Cover, grip, and washing

The topper includes a soft fabric cover described as skin-friendly, with anti-bacterial and anti-mite claims in the marketing. There are also 3D anti-slip dots on the bottom designed to help the topper stay put if you move around.

It also has elastic straps (mentioned in the product name) and a zipper for disassembly and washing. That’s a practical combo: straps and grip help reduce shifting, while a washable cover makes day-to-day care more realistic.

That said, the zipper and cover design can be the difference between a topper you’ll actually keep clean and one you avoid cleaning. If you’re the type who values fresh-smelling bedding and easy maintenance, this is a point in its favour.

Key limitations to consider before buying

A mattress topper is a “surface adjustment”, not a repair. If your mattress base is already badly sagging, uneven, or very uncomfortable on its own, a topper may not fully fix the underlying problem.

Also, while it’s positioned for back pain relief, back pain has lots of causes. Comfort can improve, but it’s not guaranteed to suit everyone. If your back pain is severe or medical advice has been given to you, it’s worth being cautious and not assuming foam alone will solve it.

Who it suits (and who should skip it)

This is a good fit if you want to refresh a Kingsize mattress with a thicker layer (7cm), prefer a memory foam-style contouring feel, and like the idea of a firmer option by flipping the cover.

It may not be a great match if you’re looking for a very lightweight topper, or if your main issue is a seriously worn mattress that needs replacement rather than a comfort layer.

A solid use case: you’ve kept your mattress for a while, but certain sleeping positions start to feel uncomfortable. Adding this topper can give you a more supportive surface and a more breathable, cooling-oriented sleep feel—without changing your entire bed setup.

In the box & quick care expectations

The listing describes a mattress topper with a washable cover and straps, plus a metal zipper for convenient disassembly. Exact contents beyond the topper aren’t stated in the information provided, so it’s best to check the product listing details for what’s included.

For care, the key benefit is that the cover is positioned as washable. Foam toppers often need gentle handling, so keep an eye on the instructions once you receive it.

Final verdict

Worth considering if you want a Kingsize memory foam mattress topper that aims to balance pressure relief with support, and you’d like a cooling element for warmer nights. The double-layer, flip-to-firmer concept is a practical touch if your comfort needs vary.

Skip it if your current mattress is genuinely broken down and uncomfortable at the core—at that point, a topper can feel like a temporary workaround rather than a true fix.

Mini FAQ

Will this help with back pain?

The topper is marketed for back pain relief through pressure reduction and a firmer option. Comfort improvements are possible, but back pain causes vary, so it’s not something you can rely on as a guarantee.

Is it suitable for hot sleepers?

It’s designed with cooling gel beads and bamboo charcoal (as described). That should help with comfort for some people, though room temperature and bedding still matter.

Can I wash the cover?

The cover is described as having a zipper for disassembly and washing, so you should be able to keep the top layer cleaner than with non-washable covers.

Does it stay in place?

Anti-slip dots on the bottom and elastic straps are mentioned in the product information, both intended to reduce shifting when you move around.