Simba Hybrid Pillow reviewed

The Simba Hybrid Pillow is an adjustable 45 x 70 cm pillow whose core is filled with small foam cubes, which Simba calls Nanocubes. You take cubes out or put them back to change both the height and the firmness, and a single costs £109 on the brand’s own shop.

How the Nanocube core works

Under the zip-off cotton cover the pillow has three working parts. An outer sleeve of Simba Renew fibre, made from recycled plastic bottles, gives the soft top layer. Beneath it a polyester inner cover holds the Nanocubes, and an open mesh border runs round the edge to let air through. Simba states on its product page that the foam is certified to CertiPUR requirements. CertiPUR is the European foam programme run by EUROPUR, in which independent laboratories test the foam of label holders every year (EUROPUR on CertiPUR).

The pillow arrives in a reusable storage bag with a second, smaller mesh bag for the cubes you remove, so nothing gets lost if you change your mind a month later.

Setting the height and firmness

Simba describes the Hybrid as soft, medium or firm depending on how many cubes you leave in, which is why we class it as adjustable. The 5 out of 10 on our firmness bar marks the middle of that range, with a full core towards the firm end and a thinned-out one towards the soft end. Side sleepers usually keep most of the core, because the pillow has to fill the gap between shoulder and ear. Back sleepers tend to take out a handful. Front sleepers need a much flatter pillow and will remove a large share. Expect a few nights of trial and error before you settle; even Simba’s own summary of its reviews mentions an adjustment period. On 8 October 2026 the pillow carried a 4.7 out of 5 rating from 38,854 reviews on Simba’s shop, a count that Simba says includes earlier versions of the design.

At 45 x 70 cm it is a little smaller than a standard 50 x 75 cm UK pillowcase, so ordinary cases fit with some room to spare.

Temperature and care

The cotton cover carries Simba’s Stratos finish, which Simba says tested up to 3°C cooler than untreated fabric in measurements by HeiQ in November 2020. That is a figure for the fabric in a lab rather than for a whole night in your bed. Still, the mesh border and the loose structure of the cubes give warm air more ways out than a solid block of memory foam. The cover goes in the machine at 40°C and can be tumble dried on low heat, while the inner pillow should only be spot cleaned.

Price, returns and who it suits

We checked the price on 8 October 2026: £109 for a single with no struck-through figure, or £199 for a pair. Key workers, students, carers and some other groups can claim an extra discount through Simba’s community scheme. Pillows are not part of the 200-night trial Simba gives its mattresses. Its returns page sets a standard 30-day return for every item that is not a mattress and asks for the item back in its original packaging. The 10-year guarantee terms name only mattresses, toppers and beds, so do not count on that cover for a pillow.

The Hybrid suits you if you change position during the night or have never found a pillow at the right height. If you would rather have a fixed medium-firm memory foam feel, the HeatRelease Pillow is the alternative in the same range. If price matters most, Simba’s AeroDown costs a little over half as much but cannot be adjusted.