【Includes upgraded PEVA 3.0L hydration bladder】BPA-free food-grade safe material. Upgraded bite valve with quick-release for the water bladder. Convenient to drink. No need to worry about leaks. Operate the leak-proof on/off valve to the closed position, then gently bite the suction nozzle to suck water, and the water will flow out easily. With the wide screw cap, you can add ice cubes to make your drink colder.【High-quality 600D Nylon】Made of high-density 600D tear-resistant nylon, equipped with elastic rope, high-quality D-shaped buckle and adjustable shoulder strap. The waist belt can be adjusted to 50 inches to fit all body shapes.【Large capacity, Lightweight】Overall bag size: 10.1 x 2.7 x 17.7 inches (L x W x H), capacity: 15L, lining 3L, weighs only 0.9 kg. There is enough space for the necessities you need for cycling.【2 front pockets & 1 main pocket】Use the front pocket to carry your wallet, keys, phone, towel, gadgets or other items, the main pocket can hold a water bottle and organize your other bulky items.【Versatile】Perfect for hiking, running, cycling, walking or just carrying it for a day.