The North Face Womens Borealis Backpack Brnetb/acoustcb -Nwt Officially endorsed by the American Chiropractic Association (ACA) for its anatomically correct fit on the user's back that minimizes lower back strain FlexVent injection-molded shoulder straps with additional PE foam for added comfort Comfortable padded Chemise back panel with Spine Channel and PE sheet for extra back support Mesh side water bottle pockets