Description : Hydration Backpack with 2L Water Bladder BPA Free Lightweight Insulation Hiking Pack Tactical Backpack Women Men Hydration Day Rucksack for Cycling, Climbing, Camping, Hiking Dimensions: 10.5 x 6 x 18.5 inches 10.5-inch large opening 18-Liter main compartment to fit clothes/notebook/first-aid kit/pets' stuff Built-in mesh pocket for personal valuables Exterior upper velvet pocket perfect for protecting cameras, mobile phones. Trekking poles, extra water bottle in the side mesh pockets for easy access. Helmet carry between the outer pocket and middle pocket With Ultra Elastic 3D breathable padded back & adjustable chest, waist straps , this 1.7pounds lightweight hydration backpack is comfortable and stable, perfect fits all sizes This Hydration Backpack comes with 2-Liter water bladder & bilateral hose outlets designed to free your hands The 2-Liter bladder is replaceable and supports up to 3-Liter This 2 Liter Hydration Bladder is 100% BPA free High-Density Nylon fabric and Built in Rain Cover Ideal for any rainy activities Reflective strips keep you visible in low-light conditions |