The professional water bladder with 135 degree ergonomic angle bite mouthpiece,capable for your backpack during outdoor activities.Drinking the water by the tube directly without taking your running vest off or stopping your steps.Suitable for riding, running and mountaineering etc. Specification: Capacity: 1.5L / 2L (optional) Material: PEVA Silicone Plastic 1.5L size: 31 * 17.5 cm / 14.4 * 6.9 in (unfill water) 2L size: 36.5 * 17.5 cm / 12.2 * 6.9 in (unfill water) Tube length: 102 cm / 40.2 in Optimum Temperature: -20℃ to 50℃ Weight: approx. 120 - 140 g / 4.2 - 4.9 oz Package List: 1* Water Bladder