Versatile and customizable Twin Slot™ webbing, Includes HydraPak® 1.5L Elite™ LT SL Reservoir, Zippered reservoir access with left and right exit., Breathable 3D EVA backpanel, Stretch woven front and side pockets, Side compression straps., Adjustable sternum strap with rescue whistle., Trekking pole attachments., Lightweight and breathable shoulder straps., Interior accessory pocket.