Rugging up when the temperature drops is one of life’s true pleasures – whether it’s a quiet night in or a Saturday morning sleep-in. Light, breathable and toasty, our 10.5 tog feather and goose down duvets keep you warm through the colder months. Unlike synthetic fillings that simply trap heat, our all-natural goose feather and down-filled duvets are cool, soft and absorb moisture. Goose Feather & Down filling 230 Thread Count Down Proof Encasing. Hypoallergenic. Fill Power 450. 10.5 TOG.