Whether you're suiting up for race day or training for an event a few months in advance, the Ultimate Direction Race Vesta 4. 0 keeps you prepared and on your game. The Race Vesta is constructed with a blend of coated nylon ripstop and four-way stretch mesh, combining the needs for durability in the presence of repetitive motion with flexibility and airflow. The sliding rail sternum strap lets you find a comfortable place to secure the straps, eliminating the need to adjust the shoulders throughout your run. Comfort Cinch technology lets you adjust the fit without stopping, as a simple tug moves the lumbar section to conform to your lower back for a customized fit that provides stability for the pack. Other storage like the zippered pockets and lumbar stash secure your layers, snacks, and other essentials while the two included Body Bottle 500s keep hydration on hand.