Item Name: Sport Waterproof Cycling Bladder Bag Water Rucksack Hydration Pack Backpack. Adjustable shoulder straps and thickening breathable mesh back for more comfortable use.Backpack Material: Waterproof NylonHigh quality waterproof material, lightweight and durable.Storage compartment for keys, phone, snacks, etcSuitable for: outdoor travel, camping, hunting, hiking, cycling, runningCan be filled with water bags, convenient and outdoor drinking water (
