G4Free Big Sale Hydration Pack with 3L Bladder for Running Hiking Biking Camping Cycling Climbing - Best Lightweight Backpack Water Reservoir for Runner Bicycler Outdoor Sports MATERIAL - Durable & Water Resistant Nylon, it is water resistant so your belongings stay dry even in rainy days. The ventilate mesh back provide you the comfortable feeling when you use this hydration backpack. 3.0L HYDRATION WATER BLADDER INCLUDED - No more plastic bottles to take up space ,Quick release with shutoff valve. It also includes a wide screw cap so you can add ice cubes for an even cooler drink. Enough to get you hydrated through a day of any kind of outdoor sports Hiking, Cycling, Running or Biking, Camping, Climbing, Backpacking for runners, bicyclers no matter Man or Women. 3 FRONT ZIPPER POCKETS & 1 MAIN POCKET - Front zipper pockets securely carrying your wallet, phone, snacks, keys. Quick-access main pocket for bladder with easy velcro closure to keep away from dirt. ADJUSTABLE SHOULDER/CHEST STRAPS - It fits both for men or women. The chest straps ensure that it doesn't bounce when you move. Breathable mesh back panel and Lightweight shoulder straps make your back feel more comfortable when you are in cycling, hiking, climbing, running, jogging, backpacking or other outdoor sports. GUARANTEE - If you are not 100% satisfied with our products, we offer a 30-day money back guarantee and life time replacement for defective items, so what are you waiting for! - nothing lose!