Made with organic cotton - The Mama Cheetah 2.5 TOG Baby Sleeping Bag is made of premium 100% organic cotton shell, with ultra soft polyester fill for extra warmth, which is perfect for cooler months. The organic cotton interlock minimizes the risk of overheating and keeps your baby warm and comfortable. Please be mindful of the TOG rating when ordering the right sleeping bag for your baby. | No struggling with those midnight changes - Our sleep sacks feature high quality durable 2-way zippers, which can unzip from the bottom for easy diaper changes. Also, no struggling to connect the zipper at baby's chin, as 2-way zippers unzip from the top and make it very convenient to use. | Your child's safety comes first - No more worries about loose blankets in the crib that can get twisted and tangled easily, and pose the risk of covering babyàface. Our wearable blankets were carefully designed to provide a safe and comfortable sleeping environment for baby, while preventing such potential safety hazards in your childàsleep space. Safety snap tab protects baby's neck and chin, and ensures a secure closure. The bottom zipper cover deters baby's hands from unzipping. | Generously sized and roomy - Our sleepbags are generously sized to fit over sleepwear and carefully designed so baby's leg can move freely to ensure proper hip development. | Five Sizes Available - Small size sleep sacks are suitable for babies from 0-6 months, 10-18 lbs, 23-26 in. Medium size sleep sacks fit babies from 6-12 months, 16-24 lbs, 26-30 in. Large size sleep sacks are suitable for babies from 12-18 months, 22-28 lbs, 30-35 in. X-Large sleep bags fit babies from 18-24 months, 26-36 lbs, 35-40 in. Size XX-Large was designed for babies of 24-48 months, 34-43 lbs, 40-44 in.