Keyflag product 100% cotton. Wash the pillow case right and make them last longer. Iloinen Sydän - products are recommended to be washed in 60°C mashine wash, but they can also be washed with white wash but with the inside out. If you iron or mangle the pillow case do it with the inside out. Picture will stay clear for a long time. Washing insturctions comes with the product.