Zhongbo 2l/3l3 TPU Big Mouth Full Duplex Thermal Bonding Process Water Bag Hydration Packs /Outdoor Sports Riding Backpack Water Bladder Specifications: Product Weight:3L/260G Capacity: 18*51/3L Folding water bag Specifications: 36CM * 17.5CM * 0.4MM Material: TPU Parts Material: PTU material outlet, plumbing PVC pipe, silicone mouthpiece