We know everything must be reachable on the go. So, on the PACE hydration running vest we added a front pole attachment, the 45 degree angle front pockets for the 2x 500ml Ultraflasks, two quick stash front pockets, energy/food shoulder packs, and two zippered stash back pockets. It also has a super ventilated mesh back panel, so no sweaty back. All are designed for easy access and to support the bounce free sensation of this vest. There are reflective points both at the front and back, so you are visible to those crazy cars when running in the dark.