* 18 tog Duvet comprised of a 13.5 tog duvet plus attachable 4.5 tog duvet * Machine Washable * Cool tumble dry * Hollowfibre filling This duvet set has you covered for all seasons. Featuring a 13.5 tog duvet with an attachable 4.5 tog duvet, you can wrap up warm for those extra cold nights or use the two duvets separately depending on the weather. The 13.5 tog is perfect on its own for the colder nights, whereas the 4.5tog is great for when the weather is a little warmer. The internal hollowfibre traps heat while remaining breathable & is also simple to maintain as the set can be popped in the washing machine & tumble drier.