What are the top-rated gel memory foam mattresses for under £500?

The CoolNest gel memory foam mattress uses a CoolNest breathable cover, PCM-infused polyfoam and gel memory foam layers for cooling and pressure relief, plus a zoned polyfoam support core for targeted support. It comes in multiple thicknesses and firmness levels, and is aimed at hot sleepers and those who want strong motion isolation.

An affordable all-foam mattress available in five thicknesses and many sizes, featuring a gel/copper-infused memory foam comfort layer over a high-density polyfoam base; thicker models add a VariFlex transition layer for more contouring. It offers customizable firmness by height, good motion isolation, and cooling features aimed at budget-conscious shoppers and RV/college use.

A 10 in, three-layer gel memory foam mattress with a 2 in cooling green-tea gel memory foam top, 3 in air-channel support layer, and 5 in base foam for stability. It offers medium-firm support, advertised cooling properties, CertiPUR‑US certification, and a soft knit cover; suited for budget shoppers and many sleep positions. Includes a 10-year warranty and ships compressed in a box.

A 12 in gel-infused memory foam mattress with a quilted fabric cover and plush feel that contours for pressure relief while the foam base provides support. It's marketed as cooling via gel infusion and suits sleepers who prefer a softer, contouring surface at a budget price.

A 10 in all-foam mattress with a 2 in gel-infused memory foam comfort layer over supportive foam, designed for pressure relief, motion isolation, and budget pricing. It offers a medium-firm feel, a breathable cover for basic cooling, a 180-night trial and 10-year warranty, making it a value pick for many sleepers.

The Siena 10in Signature is a value-priced all-foam mattress with a medium-firm feel, gel-infused memory foam comfort, and a high-density foam base for support. It offers strong motion isolation and a breathable cover for better temperature regulation than many budget foams, making it suitable for lightweight and average-weight back and side sleepers. Available with a 180-night trial and 10-year warranty.

Three-layer 10 in foam mattress with a 2 in gel memory foam comfort layer, 3 in support layer with air channels, and 5 in base foam; medium-firm feel, CertiPUR-US certified, compressed in a box and ships from multiple retailers. Suits sleepers who want a cooler-feeling, budget-friendly memory foam mattress with good pressure relief and low motion transfer.

The CoolNest is an all-foam, cooling-focused mattress available in 12, 14, and 16 in thicknesses with a five-zone support system. It uses a ventilated CoolNest cover, PCM phase-change foam and gel-infused memory foam for temperature regulation and strong motion isolation, suiting hot sleepers and couples.

An affordable all-foam mattress available in 6, 8, 10, and 12 in profiles with a green-tea-infused memory foam top layer, polyfoam transition, and a high-density polyfoam support core. Cooling gel and a cool knit cover are offered in specific Cooling/Ultra Cooling variants; the mattress suits budget shoppers who want classic memory-foam contouring and motion isolation.

The Zinus Cooling Green Tea 10 in mattress is a three-layer gel memory foam bed with a 2.5 in green tea memory foam comfort layer over transition and high-density base foams, designed for pressure relief and reduced motion transfer. It uses gel infusion and a breathable cover for enhanced cooling and is offered with a 100-night trial and 10-year warranty. It suits side and back sleepers who want a budget-friendly, contouring memory foam feel.