Feature: 1.High-quality Material: The hydration bladder is made of high-quality PE and EVA material, equipped with TPU drinking water hose, wear-resistant, corrosion-resistant and no peculiar smell. It is an ideal water replenishment equipment for you to keep moisture when living outdoors. 2.Water Flow Control: The bite is equipped with OFF/ON valve to control whether the water is coming out, just bite the nozzle pipe to suck the water, through the bite force to control the size of the water flow. The switch valve and portable double seal clamp perfect design to ensure that water reservoir has a good sealing performance. 3.Wide Mouth Design: The wide mouth design at the top is easy to add water, ice, various sports drinks, hand or brush can easily touch the inside of the hydration water bladder for cleaning. 4.Easy to Use: The mouthpiece is equipped with a dust cover to prevent dust from entering. Remove the dust cover, open the switch valve, and gently bite the mouthpiece with your teeth to drink water. 2L drinking water bag portable sports water bag Material: EVA Capacity: 2L drinking bag portable sports Weight: 185g Scope of application: outdoor sports, leisure, camping, mountaineering, bicycle travel, etc. During strenuous exercise, you can replenish water in time, and the design of the straw can release your hands when drinking water, which is convenient for continuous exercise. How to use: Open the dust cover of the straw, gently bite the nozzle to absorb water, and then completely release your hands.