When you're out for a quick pedal or hike on the trails and only need to bring water and your keys or phone, reach for the Osprey Katari 3L Backpack. Its airmesh backpanel and rolled soft-edge shoulder straps keep you comfortable, mobile, and cool as you hike or bike. A dedicated external hydration sleeve holds the included 2. 5L reservoir to keep you hydrated while the side mesh and front zipper pocket hold your must-haves such as your phone, keys, and wallet.