Silentnight Deep Sleep Mattress Protector in Single, Small Double, Double, King and Super King sizes Enjoy a sound night’s rest and keep your bed fresher for longer with the Silentnight Deep Sleep Mattress Protector. A deep, comfy filling and quilted finish ensure it’s wonderfully comfortable, and the elasticated corners keep it secured to your mattress. It comes with a 2-year guarantee for your peace of mind too. Washing Instructions: Machine Washable