Coghlan"s 15L Compression Sack: * Material: 70D nylon sides with 210D nylon top and bottom * Size: 15L (8" x 18") * Flip-Top-Lid prevents strap tangling * 4 straps with buckles allow for even compression * Handy grab handle on top for transporting * Unique self-storing pocket design stows sack into a small flat disc