Camelbak has done it again! Maximum features with minimal weight. Designed with an Air Support Back Panel with body mapping technology to help you keep cool. Your water bottle is centered in the middle of the belt for easy access with either arm. Need a new water bottle? This wasitpack comes with a Podium Dirt Series 21 oz Water Bottle. Reflective features help you be seen on and off the trail. Minimalism to the max!