Sea to Summit Travelling Light Ultra-Sil Travel 40L Duffle Bag nylon 10.5 gallons/40 Liter volume capacity and strong enough to carry a heavy load Ultra-Sil fabric for packability, strength and durability Durable #4.5 YKK zipper Bar tacked, reinforced stitching at key stress points Fits snugly in the accompanying stuff sack with a Hypalon key ring attachment