Down and feathers mattress cover. Provides firmness and a quilted feel that adapts to the curvature of your body. The filling is down and French white duck feathers, and the surface is made of combed cotton percale, 230TC and downproof, allowing the feathers to breathe and preventing the filling from escaping. Super soft. 4 cm high and includes two elastic bands for a secure fit and easy positioning. Firmness: 1650 GSM Do not air dry, tumble dry at a low temperature.