Fit and Design: Wide-mouth, bucket-style main compartment opening with internal zippered mesh pocket and key clip Top panel external zippered slash pocket Large stretch mesh front panel pocket Tuck-away ice ax attachment with bungee tie-off Stow-on-the-Go trekking pole attachment Stretch mesh side pockets External hydration reservoir sleeve Easy-access, expandable stretch mesh harness pocket Dual-zippered fabric hip belt pockets Dual upper and lower side compression straps Technology: PFC-free DWR coating An injection molded AirScape(R) backpanel Additional Details: Bluesign(R) approved