【ERGONOMIC AND CONTOURED DESIGN】The Hiking Backpack Water Bladder Vest Kit aligns your back while gently protecting your muscles.the Ventilated Mesh Cover keeps air circulating and prevent discomfort from accumulated heat,providing superior air circulation and breathability to keep your back cool.

【PERFECT COMBINATION】Our running backpack H 14.5" x L 7" x W 0.07"; Weight: 0.18kg (0.2lbs).The lightweight cycling backpack has adjustable hipbelt and shoulder straps that can be modified to fit your torso. The perfect size offer a nice balance of reasonable weight and bulk while providing a sufficient quantity of water, fit for men, women, and youth.

【Safety&Multiple Storage】Reflective trim for night safety, and strap clips to keep extra straps secure. In addition, There are two large and two small pockets on the front of the bag, You can put some gel/soft candy/paper towel/towel/mobile phone/key or any other items in the front pocket. Sweat can be avoided for quick and easy access.