Geigerrig RIG 1200 Pressurized Hydration Pack, 100 fl. oz. Sprays, Filter Ready, Reversible 3 Liter (100 oz.) Hydration Engine, Reversable Dishwasher Safe Reservoir 1200 Cubic Inches of Pack Capacity. Light Weight, Guardian Internal Pack Frame. Plenty of storage. Durable, light weight Ballistic Rip Stop. Side compression straps. Two front buckled compression straps. Bungie Storage. Bottom towing loop. Mesh Side Pockets. Fleece Cell Pocket. Internal organizer pockets. Removable waist strap for more freedom when needed