The VestPac H2OPac is the lightest VestPac yet! It features a breathable 3D Airmesh hydration panel and rugged elastic straps to ensure a snug fit every time. The shoulder straps are free to move side to side for a custom fit, while the waist strap is designed to be worn directly below the chest line for maximum support and comfort. Recreational joggers and marathon runners alike will find their new best friend in the H2OPac.