Stokke SLEEPI Cover Keep kids warm and comfortable with Stokke SLEEPI Cover. The pleasant cover is made of cotton on the outside and terrycloth on the inside, making it very soft on baby"s delicate skin. Why You"ll Love It: Extremely soft and comfortable, the cover can keep baby warm and cozy. Features Made from 100% cotton and terry cloth Free from chemicals and dangerous printing liquids Machine washable Easy to clean and convenient to use