When you need to compress your gear without adding unnecessary weight, the Sea to Summit XS siliconized compression sack is the perfect choice.. . Flip top lid design prevents strap tangling. Sack made of 30 denier diamond ripstop siliconized Cordura. Four adjustment straps for even compression. Extra long straps allows the sack to really be filled to capacity. Bar tack reinforced stress points. Pull handle on the bottom for easy removal of contents. Slippery finish for easy packing. Volume: 366 cu. in. 6 L.