See pictures for details Made with soft, breathable muslin fabric, it features a 2-way zipper that opens all the way around the bottom for easy diaper changing and a sleeveless design. Manufactured at an OEKO-TEX Standard 100 certified factory, sleep bags are free of toxic chemicals and always safe. * Designed for either bedtime and naptime * Soft, breathable, double-layered woven muslin * Sleeveless design * Two-way zipper * Rayon/cotton