700 Cubic Inches of High Quality Pack Capacity. Reversible, dishwasher safe, pressurized hydration reservoir. Filter Ready. 70 Oz. The simple spray action of the Geigerrig hydration system enables the water to be sprayed for cooling, cleaning, and sharing. The spray action of Geigerrig also enables the use of a Geigerrig plug-n-play, in-line water filter for on-the-go filtration of water found along the trail. Simply refill from a river, stream, lake or pond; pressurize the reservoir; and then plug in the small, lightweight Geigerrig filter. Now you can safely drink the crisp, cold stream water. No longer do you have to worry about running out of water. Carry less water; use the water as you need for cooling, cleaning and sharing; and refill from water found along the trail. At day’s end, turn the reservoir inside out to clean it and to dry it. Reservoir is dishwasher safe, top shelf. This pack combines the best in multi-sport function and military grade molle engineering. Front Molle webbing for attaching pockets. Molle and quick-release compression straps are a great holster for trekking poles. Elevated padded air mesh back panel. Internal guardian back frame for stable, comfortable pack ride. Sealed audio pocket. Internal accessory organizer pockets. Removable waist belt. Reflective logos. Highly durable 600D poly fabric. 700 Cubic Inches of capacity for a small lunch, extra socks, extra t-shirt, map, cell phone, light weight wind shirt, etc. The pack is 20†long, 11†wide, and 2.125 lbs. The reservoir is 11†tall, 7†wide. The reservoir (or bladder) can be easily transferred from this pack to any other pack or hydration bag. Your Geigerrig pressurized hydration reservoir has a lifetime warranty for any leaks. Don’t forget to buy a Geigerrig filter.