<b>Backpack:</b> <br>- Made of durable nylon: resistant to abrasion, wear and tear <br>- Two layers design: one for the liquid container, and the other for keys, compass, phones, etc. <br>- Wide webbed shoulder straps with holes for the water tube <br>-Reflective article design for better safety <br><br><b>Water Bag:</b> <br>- Made of safe, non-toxic, environmentally friendly material <br>- Stores 2 liter water from 68°F to 104°F (20°C-40°C) <br>- Water sipping tube that connects to the bottom of the water bladder <br>-It's simple to drink, pull the rubber mouth piece out and the water comes right out. Push rubber mouth piece back to close, You don't have to bite anything!<br><br><b>Feature:</b> <br>Material: nylon & dacron(lining) <br>Style: outdoor running, cycling, biking <br>Capacity: 2L backpack + 2L water bladder <br>Color: green/ blue /black /red /orange <br>Applications:<br>Cycling, hiking and other sporting activities. <br><br><b>Package Including:</b> <br>1*backpack <br>1*water bladder <br><br><b>Warranty </b> <br>Please do not hesitate to contact us if you are not satisfied for any reason. Our products are backed by 18 months Warranty.