2-way custom YKK zipper: Opens around the bottom for easy diaper changing. Breathable Fabric: Made from lightweight and breathable Muslin fabric. 70% rayon from bamboo, 30% cotton Versatile Use: Suitable for babies and toddlers, providing a cozy and comfortable sleep environment at home or on the go. Easy Care: Machine washable in a garment bag; tumble dry on low. 0.5 TOG rating ensures optimal warmth and temperature regulation for summers or warm climates Keep baby safe and warm all night with our handy lightweight muslin sleep sack! Designed specifically for bedtime and naptime, this cozy and clever solution can’t be kicked off—which means a more restful sleep for the baby. 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 that’s perfect for the late spring and summer months. Manufactured at an OEKO-TEX Standard 100 certified factory, you can feel confident that our sleep bags are free of toxic chemicals and always safe for your baby.