Secret Garden Sleep BagMade for year round comfort, the Secret Garden Sleep Bag, also known as a sleep sack, is the perfect weight to keep baby snug through cooler nights and transitional seasons. Crafted with a GOTS certified organic cotton exterior and hypoallergenic polyester fill, its ideal for room temperatures of 6974F (2124C). A side to bottom zipper allows for easy diaper changes, and underarm snaps on sizes 09 months ensure a secure fit as your little one grows.