Hydration Backpack Running Hydration Vest Lightweight Runner Hydration Pack with 1.5L Water Bladder Water Backpack for Hiking Marathon Biking Raves for Women Men Runlight hiking backpack water bladder vest kit aligns your back while gently protecting your muscles.The ventilated mesh cover keeps air circulating and providing superior air circulation and breathability to keep your back cool. Running water vest backpack H 15.40" x L 10.20" x W 7.00"; Weight: 0.25kg (0.55lbs).The lightweight cycling vest backpack has adjustable hipbelt and shoulder straps that can be modified to fit your torso. The 1.5 liter hydration water bladder L‎14.17" x W 6.69";Weight: 0.15kg (0.33lbs).It can fill water and ice super quickly, simultaneously,it is more convenient to clean.The water tube (40"length) provides a wholesome flow for easy drinking,the water temperature is range -20~+50℃. The vest also features several pockets to store your phone, snacks, and other essentials.