Camelbak H.A.W.G. Hydration Pack, MultiCam, Made of Cordura, 19x10.5x10.2, Mil Spec Crux Long Reservoir Included, Reservoir Holds 3 Liters, Near Infrared Reflective(NIR) Fabric 1735901000 The HAWG is a medium sized pack that is extremely versatile and durable. With over 20L of cargo and a 3L" 100oz Mil Spec Crux reservoir that offer 25% more water per sip" the HAWG is perfect for medium to long missions. The Air Director back panel and designated place for an additional 3L Reservoir means you'll stay hydrated and comfortable regardless of mission length.