A hooded second layer that even keeps your behind warm. The Osa functions as an extra layer under a coat or jacket. Warm body and behind, all in one! 2-way YKK zipper in front. 2 hand pockets with 1-way YKK zippers. Rear waistline elastic for a perfect fit. Lycra piping in the sleeve holes and around the hood. Shell: 100% nylon ripstop. 700 fill power. 90/10 down/feathers.