Cotton Imported Zipper closure 100% Natural Organic Cotton – Super soft, breathable, warm and comfortable. zip for easy dressing and diaper changes;The detachable sleeve design, adjust as needed.Perfect sack design allows room for kicking and cannot be kicked off at night. Adorable sleeping bag is preferred by most of mothers??the material of Gauze cotton muslin is super comfortable and breath in Summer and aircondition room. Package Contents: 1x Sleeping Bag Washing Guide: Hand wash(max.86F??; Do not bleach; Do not dry clean; Drip drying in the side.