Simms Ultra Wool Core 1 4 Zip Jacket Air Mats & Water Toys this all round sleep pad balances Size:36L this all round sleep pad balances maximum warmth with minimum weight for a comfortable night’s rest wherever your journey takes you A large zipper opening down the full length of the front provides an excellent overview of contents This wool blended baselayer is soft against the skin and breathes naturally to keep you comfortably dry and warm in varying conditions when the weather can't get its act together the fabric also wicks sweat away from your skin and fights the buildup of funky odors after demanding hikes in and out of your favorite spot