Nathan X-Treme Hydration Pack (Black/Olive) Plan for the unexpected with greater storage capacity and increased bladder volume. 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. 3 liter hydration bladder with slideseal top closure and spine prevents bladder from pushing into the back Zippered main compartment has expandable stash pocket and small zippered compartment Shock cord for gear or helmet attachment Zippered back panel bladder compartment allows easy access and helps insulate