Run Your Life When going-the-distance matters, the Impulse pack's accessibility features will keep you in motion and keep your gear within easy reach. Best For Fast Hiking Trail Running Self-Supported Aerobic Exercise Get outside and get moving. Comfort and accessibility are priorities of the Impulse pack. Offered in a 9 or 11 litre sizes to ensure the proper fit, the Impulse fits close to the body to keep up with your every move. The dual sternum straps help decrease pack bounce and the Quick-Grip Storage System secures tools during short scrambles or rappels. The harness is equipped with dual pockets that fit up to 500 mL soft flasks, with an internal bungee for security. The belly belt also offers quick access options with a zippered pocket on each side. The internal Quick Compression System (QCS) makes compressing the pack quick and easy as your hydration reservoir empties, or you layer up. The 270 degree zipper opening allows you to access the main compartment without fully taking off your pack. There is also an external quick access pocket on the front of the pack as well as trekking pole/ice tool loops. Constructed with 100D Robic Nylon Rip-Stop, the Impulse pack is durable and lightweight, making it great for the days where moving fast matters.