The sleeping bag has a zipper that goes halfway up this to make the sleeping bag easy to get in and out of and to avoid unnecessary weight and size. The neck collar can be folded in so that cold wind does not enter. If extra warmth is needed to protect from ground cold, there is a compartment for a sleeping pad underneath. The Ruffwear Highlands Pad is available for purchase separately. Compression sack included.FeaturesDurable outer fabric that is water repellentLie pad compartment (sold separately) for extra insulation against ground cold and for comfortInsulated with compressible synthetic downTailored design for efficient warmth while giving the dog enough space where it needs itInsulated neck collar to minimize dragHalf-length zipper for easy walking in and out of the sleeping bag Improved packaging with included compression sack - fits in corresponding sizes on the Ruffwear Palisades and Approach Pack hoof bags Material Shell: 75 denier cire polyester with DWR (Durable Water Repellent) finish (bluesignÆ approved) Filling: Synthetic down Lining: 40 denier nylon with WR ( Water Repellent) finish YKK reverse coil zipper Compression sack: 100% 70 denier taffeta nylon (bluesignÆ approved) Made in Vietnam Care instructions Wash in cold water Low spin Mild detergent Air dry Do not use bleach Do not iron Do not dry clean