The ideal pak for carrying the essentials without sacrificing your speed or range of motion. The unique X-Factor harness crosses the body for a solid ride and dispersed weight distribution while velcro attached shoulder straps allow for a customized fit 2 liter hydration bladder with slideseal top closure to prevent leaking Spine prevents bladder from pushing into the back Shock cord for gear or helmet attachment Zippered back panel bladder compartment allows easy access and helps insulate