Gregory Inertia 18 H20 Backpack 135276-141338-0413 Comfort and convenience meet in a hiking hydration system ready to soak up spontaneous trail adventures. Meet the Inertia 18 H2O daypack, where comfort and convenience collide. An included 3D Hydro reservoir and perforated 3D foam backpanel provide a complete hiking hydration system ready for all-day adventures. Features Removable webbing hipbelt Top zippered quick access pocket with key clip Includes 3D Hydro quick-drying, soft-molded reservoir (2 Liter) with integrated handle and drying hanger Side zippered pocket for on trail, secure access and side mesh bottle pocket Dedicated 3/4 zippered hydration sleeve with SpeedClip hydration hanger for a one-handed, snap-and-go connection Reflective attachment loops and adjustable trekking pole attachment system Inline hose quick-disconnect coupling for easy refills without having to un-thread the hose from the shoulder harness Custom ComfortGrip molded zipper pulls Perforated shoulder harness with magnetic sternum buckle and hose clip for the Drylock bite valve 3D foam backpanel with supportive multi-density foam Gregory Inertia 18 H20 Backpack