If you're an outdoor enthusiast, you know how important a Hydration Backpack with bladder is to stay active on long trips. This lightweight carrier maintains your fluid levels and lets you drink hands-free. The backpack features a breathable mesh back panel to help keep you cool and comfortable on the go. Note: You'd better clean the bladder before use. feature: 100% lightweight and durable backpack with 2L hydration bladder * Hands-free water pipe pressure valve * Adjustable chest and shoulder straps * Storage box for keys, phone, gadgets and snacks etc. * Made of food grade TPU material, it is completely safe to use * Ideal for outdoor activities such as biking, rock climbing, hiking and hunting