40l Mountaintop Outdoor Hiking Climbing Camping Cyling Mountaineering Backpack Breathable Bag Waterproof Daypack 40L High-capacity,Lightweight compact packable daypack, Use SBS Zipper,YNS Brand fastener,TCS suspension system,BreathableDetachableBackpack Super carrying-CR professional adjustable weight decomposition system, rainproof design,Coming with a rain cover Powerfulplug-insystem, can hang sleeping bags,tents, walking sticks and all other things in all on this bag, Pack-in pocket doubles as a inner pocket,bottle holder on the both sides. Large front pocket, multiple elastic bands Material:Water-resistant Polyester, Waterproof fabric.Breathable mesh shoulder straps Breathable, moisture-proof, Touch smooth Reflective stripe design,increasednocturnal Safetyindex