Cotton Muslin Quilted Sleep Bag - Dino FriendsExtra cozy with signature hand painted prints. Quilted layers of soft cotton muslin trap heat. Breathable design allows air to flow freely. Creates a comfortable, cozy sleep environment all night. Two way zipper for easy nighttime diaper changes. Machine washable cotton muslin softens with each wash. Please reference the size chart to find the proper fit. Small 1018 lbs; 23"26"; 06 months. Medium 1624 lbs; 26"30"; 612 months. Large 2028 lbs; 28"32";