High density oxford cloth, waterproof, heavy duty. Handles on the top and front also are reinforced, humanized design.

Inner water bladder is food grade and professional. Safe, portable, environment-friendly and with no smell, you can put ice cube in it.

Shoulder and chest straps are adjustable to relieve pressure and change body barycenter. Air cushion strap also can alleviate stress.

Shut off on switch valve is leakproof, freeing from chaos while cycling. Convenient to drink, biting the tube as you are running.

Breathable mesh back pad can radiate heat and sweat, making your travel more comfortable.

Specification: