Reservoir Included - Comes ready for riding with an Osprey Hydraulics LT 2.5 L reservoir and sternum strap magnetic bite valve attachment. Hydraulics Quick Connect Kit sold separately Ride Stability - A rolled, soft-edged harness contours the shoulders for comfortable, stable on-bike carry Low Profile - Our lowest-volume bike packs, Katari/Kitsuma are designed for carrying essential hydration and minimal gear Body-Specific Fit - Katari/Kitsuma is designed to provide a body-specific fit to achieve comfort and stability across body types. Packs designated as Women's are best suited for shorter, narrower, curved body types compared to packs designated as Men's Dual stretch mesh side pockets Item Dimensions: 17.3H x 6.7W x 5.7D in; Item Weight: 1.17lb