Made of thick PE+EVA material, which is durable, wear-resistant, no peculiar smell, and can withstand great pressure.
Water reservoir is double sealed and hemmed and the sealing stick locks the bladder hole tightly, so it is leak proof even in pressure. The soft mouthpiece with an accessible ON/OFF valve prevents leakage.
2L hydration bladder with large water hole, which helps you easily fill water or add ice cubes into the bladder bag to get cold water. And also help easier clean the bag.
You can simply turn on the switch valve and gently bite the mouthpiece with your teeth to suck water, and lock it after drinking. When removing the sealing stick, you can easily clean the inner of the water reservoir.
TPE mouthpiece with a dust-proof cover would prevent leaking when it's flowing.