The one that started it all: Our most-loved, best-selling sleep bag. A wearable blanket that helps baby fall asleep (and stay asleep), so you’re not up all night. Designed to be safe sleep, diaper change friendly, temperature-regulating, and so soft you’ll have to touch it to believe it. Exterior97% Rayon made from Bamboo, 3% Spandex Filling: 100% Polyester Highly breathable J-shaped double zipper This collection uses digital printing instead of our traditional screen printing to preserve the vibrant colors and intricate details of the original designs. The result of this technique is a print with a slightly different hand feel that is less smooth than our usual fabric, but also with greater detail and the same quality that you love. ©2025 Mattel