Baby Sleeping Bag, Sleeping Sack, Wearable Blanket Unisex. Size Medium, 30”L x 17”W. 95%Cotton 5%Spandex 100%Polyester Filing. Very soft and gentle on baby skin. Long sleeves with foldable mittens to provide your little one full coverage in cold weather. Very cozy and comfortable for everyday sleeping. Two way zipper for easy diaper change. Please See Pictures With Measurements Carefully Before Purchasing. Thank you and happy shopping!