Slumberdown Climate Control pillows and duvets cleverly regulate your temperature so you dont get too hot or too cold through the night. Dacron hollowfibre is specially formulated to carry excess heat and moisture away from your head and body into the surrounding. Extra cool 4.5 tog duvet perfect if you get very warm in bed. Kingsize duvet. 4.5 tog duvet. 100% polyester hollowfibre filling. 52% polyester, 48% cotton cover. Machine washable at 40C. Suitable for tumble drying.