This Slumberdown Cosy Nights Combi 15 Tog duvet is made up of two separate duvets that conveniently fasten together and come apart. Use the lightweight 4.5 tog duvet for keeping cool on warm summer nights, or use the 10.5 tog duvet during transitional months. Combine both to create a 15 tog winter duvet for colder nights. It features a soft touch microfibre cover and hollowfibre filling for a cosy sleep. The duvet is hypoallergenic and designed to gently wrap around your body. It is machine washable and tumble dry safe.