Zipadeedoodah! This signature Footie now comes with the option of a zipper! Easy on and off. Just perfect for those middle of the night changes. Sizes 9 months and up follow approved "snug fit" guidelines for children's sleepwear not treated with flame retardant. Fabric Content: 95% Viscose from Bamboo, 5% Spandex Now rated UPF 50+!