Premium Natural Fabrics: silky soft Australian merino wool lining & organic cotton outer Merino wool regulates body temperature unlike any other fiber, keeping baby warm when it's cold and cool when it's hot Can be used in all 4 seasons - suitable for room temperatures 63-77F (17-25C) Foot openings allow child to sleep with feet out Unzips from bottom for easy diaper changes Zipper-pull guards to protect child's skin Nursery thermometer with dressing guide included. Some piling here and there, and the label inside is worn off, but no visible stains. Zipper works perfectly.