Description of Outdoor Research Helium Compression Sack #4 - 06 Pare your load down and travel fast on wide-open trails: these highly packable compression sacks perform on trips where weight and space need to be kept to a minimum. Constructed of silicone-coated ripstop nylon, with ripstop nylon compression rings on the ends, these sacks are ideal for compressing sleeping bags and down jackets. Two of the compression straps feature quick-release buckles to ease unpacking. A drawcord closure with a Hypalon® cordlock keeper cinches tight to keep lofty items from spilling out. The lid has a built in pocket that can be used to store small items or to hold the stuff sack when it’s not in use. Features: Dimensions: 25 1/2 x 11 in ; 65 x 28 cm Volume: 2423 cu. in. ; 39.7 liters Avg. Weight 5.6 oz. ; 159 g. Ripstop siliconized nylon Drawcord and Hypalon® cordlock keeper closure Ripstop nylon compression rings Four compression straps Bound seams on end caps for durability Lid has built-in stuff sack for self storage