96% polyester, 4% spandex. The Classic Zipadee-Zip is a must-have in every nursery. Not only does the Classic Zipadee-Zip provide a way for your baby to stay warm and cozy, but the Zipadee-Zip also acts as a swaddle transition for babies aged three months and older. Thanks to the unique starfish design, the Classic Zipadee-Zip provides the comforting, enclosed feeling of the swaddle but without limiting your baby’s full range of motion. Your baby can push up, roll over, and wiggle safely … and still soothe himself back to sleep! Additionally, the Classic Zipadee-Zip helps your baby sleep safer - no loose blankets in the crib! Available in five sizes, the Classic Zipadee-Zip is suitable for babies aged three months to three years. The Classic Zipadee-Zip is intended for sleeping only and should not be worn for running or walking. Don't hesitate to reach out to our customer support team if you have any questions!