SNOWHALE Cycling Hiking Backpack Water-resistant Daypack FKC0618 Material:Highly tear resistant nylon,water-resistant Dimensions:15.7x9.1x5.9 inches Weight:12.3oz Reflective stripe,volume control system,adjustable shoulder straps Resin sponge soft back creates a channel of air between your back and the pack so excess heat can move away from your back Bottle holder of elastic fabric,adjustable chest clip