Best mattresses 2026

“Choose the feel that matches how you sleep and compare the price of the size you actually need. A long home trial will tell you more about a mattress than ten minutes in a showroom.”

Start with firmness, matched to how you sleep

Medium-firm is the best-evidenced starting point for most adults. In a randomised trial of 313 adults with chronic low back pain, published in The Lancet by Kovacs and colleagues in 2003, people given a medium-firm mattress had better outcomes after 90 days than those on a firm one, for pain in bed (odds ratio 2.36) and for disability (odds ratio 2.10). Two systematic reviews point the same way, Radwan and colleagues in Sleep Health (2015) across 24 trial reports and Caggiari and colleagues in the Journal of Orthopaedics and Traumatology (2021) across 39 articles, both concluding that medium-firm best supports comfort, sleep quality and spinal alignment.

Then adjust for position and weight. Side sleepers need give at the shoulder and hip, back and front sleepers a flatter surface, and heavier sleepers a denser or firmer mattress so they do not sink through the comfort layers; our firm and soft mattress rankings cover both ends of the scale. Firmness labels are not standardised between brands. Emma sells the Original Pro as a 3 out of 5, yet it felt firmer in our test, so treat any brand’s label as a starting point and let the home trial settle it.

Above about 100kg, our mattresses for heavy people ranking compares weight ratings and guarantee limits model by model.

Choose a construction, then compare like with like

Most of the mattresses we rank here are hybrids, pocket springs under foam, which make it easier to change position, give firmer edges and let more air through than an all-foam build. Memory foam, as in the TEMPUR and the Nectar, contours more closely and isolates a partner’s movement; our memory foam mattress comparison goes deeper. Traditional pocket-sprung mattresses such as the Silentnight use fibre fillings instead of thick foam.

Depth and firmness are as each brand states them, except where our own test is noted. The Emma Performance price is for the 26cm model.

Which size to buy

Measure the bed frame before you order, because British sizes are shorter than continental ones. A UK double is 135x190cm, so the 140x200cm mattress many European brands sell will overhang a British frame, and two people sharing a double get 67.5cm each, less than a single bed’s 90cm. If you share with a restless partner, a king or super king is the size that stops you feeling every turn. Most of our ten picks come in all five UK sizes, but the IKEA and the DreamCloud have no small double.

Price the size you need

A double runs from £349 for the IKEA Vågstranda to £2,599 for the TEMPUR PRO Plus SmartCool at its regular price. Paying more buys deeper foam or a particular feel rather than a longer guarantee, and the Origin Hybrid’s 15 years beat the TEMPUR’s 10.

Use the trial, and know when to replace

Buying a mattress online means you cannot lie on it first, so the home trial does the job of a showroom. Trials on this page range from 60 nights on the Silentnight to 365 nights on the Nectar, DreamCloud and IKEA. Read the terms too. Under IKEA’s “Sleep on it” scheme (checked on 16 October 2026) you can exchange a slept-on mattress once within 365 days but not get your money back, and IKEA charges £25 if it collects the old one. TEMPUR asks you to keep its mattress for at least 60 nights before a return.

The National Bed Federation’s guideline, as reported in 2019, is to replace a mattress every seven to eight years, by which point it has seen around 20,000 hours of use. In the NBF’s 2019 research the average replacement cycle had fallen to 6.9 years, and Simon Williams, the NBF’s marketing manager, told Furniture News: “It would seem that a growing number of consumers are replacing their mattresses every seven years.” The NHS says adults need 7 to 9 hours of sleep and lists a comfortable mattress, pillows and covers among its self-help steps for insomnia. If your mattress is still sound but too firm, a mattress topper costs far less than replacing it.