Used twice, like new condition. Can include hydration bottles if desired. Did not come with bladder. Unisex size small. Info from website below: USWE makes bounce-free action packs that provide the perfect fit on an individual level – developed and tested together with top athletes, pro mountain bikers, and core weekend warriors since 2007. Their mission from day one is to design packs that you can wear in action with a su All features are intended for on the go access. Front pole attachment, the 45” angle front pockets for 2x 500ml Ultraflasks, quick stash front pockets, energy/food shoulder pockets, and 2x zippered stash back pockets. A main compartment on the back for extra gear, and an inner No Bounce Compression Compartment (NBCC) with pull-tight straps accessible at the front for a hydration bladder (they recommend 2L bladders). Key features: 8L total capacity, 1L hydration volume Polygiene™ Stays Fresh treatment Bounce free No Dancing Monkey™ Vest system 2x 500ml Ultraflasks in a 45” angle front pockets Inner No Bounce Compression Compartment with pull-tight straps accessible at the front for a hydration bladder. Bladder not included. Front pole attachment 2x Quick stash front pockets 2x Energy/food shoulder pockets 2x zippered stash back pockets High-ventilated mesh back panel Reflective points for night visibility Size Guide: S 80 - 92 cm / 31.5 - 36 In M 86 - 98 cm / 34 - 38.5 In L 92-104 cm / 36 - 41 In XL 104-116 cm / 41-45.6 In