Extra filling, extra softness and extra comfort for a deeper sleep. The Deep sleep range provides extra bounce, support and durability. Made in the UK with a hollow fibre filling and a polycotton cover. This duvet is hypoallergenic and machine washable at 40°C. Silentnight is the UK's most trusted bed brand with over 75 years' experience in creating products that offer solutions for every sleeper. This 10.5 tog duvet is ideal for all year round.