Outdoor Research 20-Liter Durable Stuff Sack Hydroseal coated Antron nylon is waterproof and durable, waterproof taped seams Drawcord and Hypalon cordlock keeper closure, reversed tunnel eases cinching Dust flap, webbing bottom handle, external daisy chain Dimensions: 19 3/4" x 9"/ 50cm x 23cm, Volume: 1220 cu in