STORAGE: Stretch overflow pocket is large enough to hold all of your hiking essentials Stretch side mesh pockets are perfect for holding water bottles or other gear at hand Full-zip opening Essentials organization pocket DESIGN & DETAILS: Lightweight and durable hydration pack Equipped with trekking pole attachment Command center harness provides additional support for heavier loads Ridged foam back panel offers comfort and breathability on the trail Tube trap keeps your water reservoir tube at arm's reach Dual Adjustable sternum strap 3D vent mesh Safety whistle Rain cover