ALPS Mountaineering Hydro Trail 17 L Hydration Pack - 101 oz. - GRAY/NAVY ( )
ALPS Mountaineering Hydro Trail 17 L Hydration Pack - 101 oz. - GRAY/NAVY ( ), Closeout . The perfect pack for mountain biking, trail running and day hikes, the ALPS Mountaineering Hydro Trail 17 L hydration backpack has room for the essentials, and it includes a 101-ounce hydration reservoir. Available Colors: GRAY/NAVY.