Description: Safety Promise-100% BPA and pvc free, the hydration bag complies with all relevant safety standards. Tasteless, environmentally friendly PEVA and TPU can be easily recycled. Compatible with most hydration backpacks. Space-Saving - Compact water bladder and built for long life for durable use. The water tank stands upright when full and shrinks in minimum volume when empty, ideal for saving space. Feel free to drink or fill. The more you drink, the smaller it gets.Easy drink-light suction provides abundant hydration. Drinking water via the soft bite valve directly without stopping your steps or taking off your running backpack. Convenient hydration tank for outdoor marathon, running, hiking, cycling, climbing. Practical water bag - both the top hole and the bottom connection have a sealed housing. Wide opening with sliding zipper closure reinforced leak-proof and easy to fill, clean and dry inside the irrigation water bag. Easy to carry-Very light water storage the urine collection bag is mobile enough to follow you anywhere. It can be placed compactly in a humidifying vest. A great backpack replacement for kids and adults. Specification:Material: PEVA/EVA/TPUolor: BluePackage Included:1 Piece Hydration BagNote1. Please allow 1-3mm error due to