“Decide on waterproofing first, because a quilted protector that only resists water will not save a mattress from a spilt drink or a child's accident. Then choose the top fabric for how warm you sleep, and check the skirt depth against your mattress with a tape measure.”
Three questions narrow the choice. Does the protector have to stop liquid, how hot must it wash, and how deep is your mattress with any topper? The table compares every ranked protector on those points, with the price of a UK double.
Prices are each seller’s regular UK price on 28 September 2026; a sale can lower them. Depths and wash temperatures are the sellers’ own figures unless another source is named.
Waterproof or only water-resistant
A mattress protector is a thin, washable layer that shields your mattress, and any topper on it, from stains and fluids. The label that matters is waterproof against water-resistant: a water-resistant protector, the Simba Quilted Performance among them, repels liquid for a short time, but a heavy or unattended spill can still soak through to the mattress. Bed Advice UK, the consumer site of the National Bed Federation, puts the fluid we lose each night at around half a pint, and its care guide says to always use a mattress protector. Simba also makes a protector a condition of its 10-year mattress guarantee, so a stained mattress can cost you the cover you paid for; our best mattresses of 2026 lists the guarantee terms for each brand.
The Scooms and the Fogarty Soft Touch have no membrane at all. Expert Reviews runs the same coffee spill test on every protector it reviews, and 100ml poured on the Scooms left a 43 x 30cm stain on the sheet beneath it, while in its review of the Simba TripleShield Tencel Cool no coffee got through.
Every waterproof pick here uses a thin polyurethane film (TPU or PU) rather than the noisy plastic sheet of older protectors. Emma still says its membrane can crackle for the first few nights and suggests an extra wash to soften it.
Wash temperature and dust mites
If you are buying for a dust-mite allergy, the care label matters more than any anti-allergy claim. Allergy UK is specific: “Washing at 60 degrees centigrade or above will kill mites.” The NHS advice on allergic rhinitis likewise says to wash bedding regularly at 60C and above. Most protectors in this list stop at 40°C. Expert Reviews lists the Nectar as washable at 90°C and Panda allows 50°C. Dunelm gives no figure for the Fogarty Soft Touch, which Ideal Home lists at 40°C.
Keep the expectations realistic. A 2008 Cochrane review by Gøtzsche and Johansen pooled 55 trials with 3,121 people with asthma, 26 of which used mattress encasings, and found no effect on morning peak flow (a standardised mean difference of 0.01) or on symptom scores. Its authors concluded: “Chemical and physical methods aimed at reducing exposure to house dust mite allergens cannot be recommended.” The M&S Advanced Allergy Protection, whose fibres M&S says are endorsed by Allergy UK, is the pick here aimed at allergy sufferers, but treat it as a hygiene layer rather than a treatment.
Top fabric and heat
A waterproof layer holds in some warmth, so the fabric on top decides how the bed feels on a warm night. Coolmax, a polyester fibre from The LYCRA Company, makes up 40% of the Soak&Sleep top. The Nectar and the Simba TripleShield Tencel Cool use Tencel lyocell, the Panda a 70% bamboo and 30% cotton knit, and the TripleShield Bamboo a bamboo-rayon jersey. Ideal Home, which tried 15 protectors, made the Panda its pick for night sweats and the all-cotton Scooms its best protector overall for its breathability, while its tester overheated on the polyester Fogarty Soft Touch. In our scoring, quilted polyester (M&S, Fogarty Soft Touch) rates lower for temperature than the bamboo, Tencel and cotton tops.
Depth, size and a spare
Measure the mattress and any topper, and compare the total with the skirt. The three Simba protectors and the deep Scooms fit up to 40cm, the Soak&Sleep 35cm and the Panda 32cm. The M&S, the standard Scooms and the Fogarty Soft Touch fit 30cm, with a 38cm Extra Deep M&S and a 35cm Soft Touch for deeper beds. Expert Reviews puts the Emma’s skirt at 25cm and the Nectar’s at 32cm. A protector goes over a topper, never under it, and our mattress topper and king size topper comparisons cover that layer.
For a single mattress protector, check the length before ordering. A UK single is 90x190 and an EU single 90x200, and the Nectar, M&S, Scooms and Fogarty Soft Touch come in UK sizes only. Every pick comes in a super king, the size of our super king mattress picks. Buy two if you can. Bed Advice UK says it is smart to have two so you can rotate and wash them, and Soak&Sleep, which suggests washing its protector every three to four weeks, sells its Coolmax model in two-packs for that reason.
