18-36m, 1.0 tog, wear in pic shown by zipper and some pilling in pictures. 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 youre not up all night. Designed to be safe sleep, diaper change friendly, temperature-regulating, and so soft youll have to touch it to believe it. Exterior: 97% Rayon made from Bamboo, 3% Spandex Filling: 100% Polyester Highly breathable J-shaped double zipper Use as a wearable blanket over pajamas for safer, cozier sleep