A mattress can be a pricey investment, so it makes sense to try and extend its lifespan as much as possible. That’s where the best mattress protectors come into play, acting as the first line of defence against stains and general wear and tear, helping to keep your bed in better condition for longer.To find out which mattress protectors offer real value for money, I tried and tested a variety in real homes. Whichever you choose, a water-resistant layer is essential. At the same time, it should be breathable enough to stop you waking up hot and uncomfortable. Natural materials can be a good option if you tend to overheat, but they often cost more than synthetic alternatives.After extensive testing over many weeks, Nectar’s mattress topper (£45, Nectarsleep.co.uk) came out on top for me. It’s waterproof, breathable, and fits over a bed easily. But I’ve also covered options for kids, those with allergies, and a cooling option. Keep scrolling for my full review and verdict. Read more: Best mattress toppers, testedThe best mattress protectors for 2026 are:Best overall – Nectar mattress protector: £45, Nectarsleep.co.ukBest budget buy – Staydrynights terry towelling waterproof mattress protector: £18, Dunelm.comBest for all seasons – The White Company temperature balance quilted mattress protector: £125, Thewhitecompany.comBest waterproof design – Emma mattress protector: £63, Emmasleep.co.ukBest for kids – Silentnight waterproof mattress protector, single: £12, Amazon.co.ukRead more: Best pillows, tested