Breathable design for increased ventilation; 5 front pockets, including 1 zippered pocket and 2 soft flask pockets that fit up to 500mL bottles (not included); 2 rear pockets, including a hydration-compatible pocket that holds up to a 2L reservoir (not included); Reservoir hose strap; Adjustable Comfort Glide side straps and 2 adjustable sternum straps offer bounce-free fit; Reflective logos and front pull tabs for increased visibility in low light conditions