The redesigned CamelBak Cloud Walker 18 Hydration Pack - 85oz will keep you hydrated without adding any unnecessary weight as you roam along the trail. You'll have plenty of water for the journey with the generous Crux® Reservoir while the Air Support Back Panel provides maximum ventilation on the hottest areas of your back. The removable waist straps are there for added stability and adjustability when you need them. Exterior and side pockets keep your smaller gear easily accessible.