Klymit Motion 35 Ultralight Air Frame Backpack TOP OF ITS CLASS: Ultra lightweight Air Frame technology allows for a dynamic carry to increase energy, stiffness, comfort, and customization KEEP YOURSELF HYDRATED ON THE TRAIL: YKK Aquaguard zips and Hydration Compatible COMFIEST PACK ON THE MARKET: Conforms perfectly to the shape of the back while utilizing the natural properties of gravity and air INNOVATIVE DESIGN: Integrated pump allows you to adjust the pressure on the move for full load transfer and stability; Air Frame also provides great lumbar support SPECIFICATIONS: Weight: 1.5 lbs; Volume: 35L +3L pocket; Load Rating: 35lbs