Let the Stokke® Sleepi™ Mini Mattress by Colgate lull your little one into a peaceful sleep. Rated #1 Polyurethane foam mattress on Consumer Reports, this mattress is the ideal support for your baby. Designed to fit the Stokke® Sleepi™ Mini, this mattress is firm, strong and durable with a non-toxic cover and waterproof backing. The mattress cover is removable and 100% machine washable for easy cleaning.