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