<b>Features:</b> <br> 1. Lightweight straps design, much more comfortable. <br> 2. Rugged 900 Denier Polyester heavy-duty construction, perfect for hiking, cycling, running or biking <br> 3. Whistle buckle on chest straps for emergency <br> 4. Two front pocketsare very practical, suitable for storing small articles such as mobile phone. <br> 5. Molle system for attaching your extra tactical equipment <br> 6. Integrated breathable mesh pad in the back, breathable and not muggy. <br> 7. The nylon fabric, prevent the items inside from being wet. <br>8. if you have problem of plastic taste of the water when you try it, please use Soda Water or Warm Water to remove the this taste for times until this it goes away BEFORE you take it outside for outdoor sports.<br>9. If the leak problem happens between the hose and the bladder, please Email us on Amazon firstly, we will send you the correct connecting direction pictures for help, please understand that we are not doubt your experience, but our suggestions are HELPFUL mostly.<br><br><b>Tube connection</b><br> Please screw the tube to the bottom of the connection, until the rubber ring on the tube is not visible. If there is any leaking problem, please feel free to contact us.