Sarvis SL series is designed for Mummy bag sleepers who don’t want to roll off their pads. Featuring an attachable half-length REM Flex Pad Sleeve™ to attach your 20 or 25-inch wide pad and give your legs more freedom to flop around. Cinch cold air out of the footbox with the built-in internal cinch system, and adjust both length and width with external clips to minimize cold air spots and maximize heat retention. The adjustable length features are ideal for pre-teen campers to grow into through their college years. Thermally efficient, vertical structured side walls trap heat close to your body while the contoured shape of the hood cradles your head in lofty comfort. This bag's versatility is the perfect companion for multi-night treks or road trips to the desert.