The professional water bladder with 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. Features： Made of premium food grade TPU and TPE material,safe and taste free. Equipped with a ergonomic angle bite mouthpiece and high flow PVC water tube,just need less angle to put mouthpiece into your mouth and drink higher water flow per sip. The bite mouthpiece has ON/OFF valve,simply pull valve up for drinking and push it for closing. A dust cover helps to keep the mouth piece of the water reservoir clean. Large and wide opening mouth makes filling/refilling water quickly and cleaning easily for every corner. Double sealing edge and sealing clamp,make sure the pressure tolerant and leak proof features. Optimum Temperature is from -20℃ to 70℃,portable to store hot/cold water during outdoors activities. Multiple mounting holes for easy carrying out or store in your backpack. Suitable for riding,running,cycling,camping,hiking,mountaineering,outing or excursions etc. Specification： Color: Blue/White (optional) Size: 1.5L/2L/3L (optional) Material: TPE,TPU,PVC Water tube: Approx. 96cm/37.8in Optimum Temperature: -20℃ to 70℃ Package weight: Approx. 120-140g/4.2-4.9oz Package List: 1* Water Bladder NOTE: 1.Please use Size Chart to ensure correct fit.Details please see the size chart. 2.Please do not pull out the water tube,which easily causes leakage.