The Stokke Sleepi Mini Bumper is 100% cotton and has no chemicals or dangerous printing liquids are used. This provides the softest and most comfortable touch on your baby?s delicate skin. The Stokke Sleepi Mini Bumper designed to fit Stokke Sleepi Mini and coordinate with solid color options. Cleaning instructions: Machine wash warm, max 140 Fahrenheit. Do not bleach, dry clean, or tumble dry. Iron low heat.