Source Tactical Assault 20L Cargo Pack with 3L Hydration System Military quality pack with overall cargo capacity of 20 liters (1220 cubic inches); 3-liter WLPS hydration reservoir (100 ounces) Contoured Shoulder Straps, Adjustable Flexible Sternum Strap, Waist Belt - Keeps load stable and distributed on hips/shoulders as needed Main cargo compartment, plus MOLLE loop attachments, external pouch, and compression straps Non-bite Storm push-pull valve for straw-like drinking; angled design for less tubing Drinking tube with Cool Weave cover blocks UV light and insulates; compatible with QMT accessories