<b>Product description：</b><br/><br/> The biggest function of the hydration backpack is not to place a camera, a cell phone, or a wallet, but to allow you to drink water whenever you want to drink.<br/> The lightweight design and stable system on the back allows you to forget a bag on your back.<br/> The backpack's carrying system targets the back, the back of the neck and the shoulders, allowing the weight and inertia of the backpack to be evenly dispersed.<br/> Not only is it comfortable, but it also provides good stability. When you are riding or hiking, it can safely rest behind you without bounce.<br/><br/> <b>Product Parameters:</b><br/> Material：Water-resistant 900D Polyester<br/> Product Dimensions:17.7’’*11.8’’*4.3’’ (H*W*D)<br/> Backpack Weight: 1.9lb<br/><br/> <b>Package Includes:</b><br/> Backpack * 1<br/> 2L BPA FREE hydration bladder * 1<br/>