Geigerrig Pressurized Hydration Pack. Reversible, dishwasher safe, pressurized 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 more often from water found along the trail. At the end of the day, simply turn the reservoir inside out to clean it and to dry it. You can even put the reservoir in the top shelf of the dishwasher. The backpack has a removable, internal frame for comfort and a stable ride. Soft, durable, ventilated mesh back pad. Soft, Durable, ventilated, mesh shoulder strap. Made of 840 ballistic nylon, similar to the fabric Dupont designed for military flak jackets. Contains an internal sleeve to holster the reservoir, and a small amount of pack space to carry your keys, a few granola bars, and a few odds and ends such as your cell phone, wallet, etc. The pack is 17.5” long, 9” wide, 1.5” thick, and 2 lbs. The reservoir is 11.25” 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. The system also enables in-line filtration using Sawyer filters.