Size: 6-18 months 100% Merino Wool Lining / 100% Organic Cotton Outer REDUCE OR ELIMINATE SLEEPLESS NIGHTS - When baby sleeps better, so do parents. PREMIUM FABRICS for best comfort: Australian merino wool lining - 100% natural, luxuriously soft, and temperature regulating. GOTS certified organic cotton outer. Optimal weight merino wool REGULATES BODY TEMPERATURE so it can be used in all 4 seasons. Available in three sizes: 6-18, 18-36 months and 3-4T. Use over regular sleepwear to take the place of loose blankets. FOOT OPENINGS allow for mobility when child is awake. Generous size so child can tuck feet in when sleeping. Unzips from bottom for easy diaper changes. Machine-washable. PREMIUM QUALITY PRODUCT, comes with 6 months warranty from a US company with US customer service. Buy with confidence from Woolino, the makers of the #1 selling and #1 rated baby sleeping bag in USA and Canada since 2010.