The CamelBak Women's Spire 22 LR Backpack was built for overnight backpacking trips and all day hikes into the wilderness. Not only does the Spire have all the water carrying features you'd expect from CamelBak, but the bag features a women specific design for complete comfort on the trail. The open mesh SV back panel allows air to pass between your back and the pack for a cool and comfortable fit, while the load bearing hip belt redirects the majority of the pack's weight to your hips where you can more comfortably carry it. The time tested,100 ounce Antidote reservoir holds more than enough water for a day's worth of hiking, and allows you stay one step ahead of dehydration with a simple design, which allows you to take a swig with just the turn of knob. The pack's four point compression system keeps your load tight and together, and two gear loops stow your trekking poles or ice axe when the day's objective warrants some extra help.