VERSATILITY This hydration pack is specially designed for road cycling , running , hiking, compact structure, small size, make your back light and stable, will not produce a lot of wind resistance. It's the ideal choice for running, cycling biking, hiking climbing, skiing, hunting pouch, music festivals, carnivals, kayaking. FRIENDLY DESIGN HYDRATION PACK Reflective trim for night safety, and strap clips to keep extra straps secure. In addition, there's a mesh bag in the front of the water backpack that allows you to store your mobile phone, towel or any other object for quick access. PERFECT FORM FITTING WATER BACKPACK The lightweight cycling backpack has adjustable 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 kids. HIGH QUALITY 2L HYDRATION BLADDER The BPA free hydration bladder adopts double sealing surface technology, which greatly improves the durability and has passed the air pressure test.The soft mouth with an easily accessible ON/OFF valve prevents leakage, and the water flow is conveniently controlled by the bite. HYDRATION BACKPACK PACK Included 70-Ounce (2 Liter) food grade hydration bladder, padded shoulder straps, breathable system and lightweight design made it the perfect water backpack for men, women and kids for outdoor sports to keep hydrated.