Cotton PERFECT NEWBORN SIZE: Swaddle 0-3 months designed for 6-14 lbs babies, made of 100% natural and breathable cotton, providing comfort for your growing infant VERSATILE LEGS IN OR OUT: Patented zip swaddle design offers legs in for warmth or legs out for cooling, preventing overheating and ensuring a comfortable sleep HIP HEALTHY & SAFE: International Hip Dysplasia Institute's designated swaddle sack, supports proper hip health and joint development with a generous leg pouch EASY DIAPER CHANGE: Convenient Velcro baby swaddle allows quick diaper access by unsnapping at the chest and pulling the leg pouch down without unswaddling NO RISE NECKLINE: Embe's baby swaddles 0-3 months with strong Velcro and zipper keeps collar in place, avoiding risks of traditional swaddles or loose blankets covering nose and mouth