* 3-in-1: Two duvets, three combinations, so you can sink into a deep sleep, no matter the season. A 4.5 tog summer duvet for warmer months and a 10.5 tog duvet perfect for year-round cosiness. Easily fasten both duvets together for an extra warm 15 tog duvet for the coldest winter nights. * Versatile Comfort: Provides ultimate flexibility, mix and swap your duvets when the weather changes, so you can sink into a deeper sleep through every season. * Easy Fastening: Simply fasten the duvets together using the handy poppers. * Hypoallergenic: Kind to skin and does not include any contents likely to cause allergies. * Machine Washable: Machine washable so you can enjoy fresh comfort all year round. * Quality Guarantee: 5-year manufacturer s guarantee. Sink into a deeper sleep, no matter the season. Whether you are a heat seeker or an over heater the Silentnight Deep Sleep All Seasons Duvet has been specially designed to help you sleep more deeply through every season. This product includes two duvets that can be used in three different combinations; 4.5 tog, 10.5 tog and 15 tog. To create the 15 tog duvet simply fasten the 4.5 tog and 10.5 tog duvets together using the poppers to create a duvet that will keep you warm and snuggly in coldest seasons. The two duvets can be used separately, use the 4.5 tog duvet in warmer summer months to keep you cool and the 10.5 tog duvet is great choice for all-year round use. This Silentnight Deep Sleep Duvet gives you the peace of mind that whatever the weather you will have the perfect duvet to help keep you at the right temperature. Silentnight are the UK s most trusted bed brand with over 75 years experience in creating products for every sleeper.