CamelBak M.U.L.E. 100oz Hydration Pack. The venerable CamelBak M.U.L.E. Hydration Pack continues to be the workhorse pack of choice for the off road set and for 2015 it's received enhancements to further up the ante. The M.U.L.E.'s 100oz reservoir lets riders hydrate for 3 hours on the trail, plus there's 549 cubic inches of gear space with multiple zippered pockets as well as an overflow cargo option. Thermo molded pods of the XV back panel offer superior cross ventilation in a comfortable, lightweight design. Additionally, the Independent Suspension shoulder straps with ultra light 3D mesh and perforated foam are also superbly comfortable out on the trail. Included is the innovative Antidote Reservoir the ultimate cure for dehydration while the new Magnetic Tube Trap on the shoulder strap is perfect for keeping the hydration tube firmly in place and readily accessed.