The Osprey Seral 7 has everything you need for a day on two wheels, with Tardis-like storage and a smooth-flowing hydration system.The 1.5-litre Hydraulics Lumbar Reservoir features a 180 degree on/off bit valve that gives you a smooth, fast water flow whilst minimising leakage. The hose\'s ergonomic design contours the shape of your back and has a magnetic fastening meaning it stays securely in place until you\'re thirsty.The ventilated AirScape backpanel with foam ridges prioritises airflow, so you\'ll barely notice that you\'re wearing a pack. A ventilated mesh hipbelt with compression straps on both sides ensures a tight yet comfortable fit, making sure your pack stays stable and secure as you ride.With a 1.5-litre hydration pouch, you\'d be forgiven for thinking there wouldn\'t be much room left in a compact waist bag. Somehow, Osprey have managed to fit in a front zip pocket, mesh side pocket, an organisation pocket, two zip hip belt pockets and a scratch-free sunglasses and electronics pocket. Add to that a key attachment clip, and you have everything you need for a day on the road or trail.Unisex cycling specific lumbar-pack from Osprey1.5L HydraulicsTM Lumbar Reservoir includedAirScapeTM backpanel with foam ridges for comfort180 degree on/off bite valveFront zipped pocketZipped scratch-free sunglasses/electronics pocket2x zipped hip belt pocketsInternal hydration sleeveInternal organisation pocketInternal mesh side pocketInternal key attachment clipLight attachment pointSide compression strapsReflective graphicsMain fabric: 210D Poly HoneycombMaximum dimensions: L20 x W33 x D15cmWeight: 0.37kg