Osprey Seral 7 Lumbar Pack Ain't No Mountain High Enough The Seral 7 is for mountain bikers who want to stay hydrated and carry the essentials without a full backpack. Built with a bike-specific fit, this lumbar pack stays low and close to your body so you can shred technical terrain without distraction. The included 1. 5L Hydraulics reservoir keeps you refreshed, while the zippered main compartment and hipbelt pockets hold your spare tube, patch kit, CO2, and snacks. Compression straps lock everything down so nothing bounces or shifts on rough ground. Features Bike-specific angled hipbelt with compression straps for stability on technical terrain Air Scape backpanel with contouring lumbar wrap keeps your lower back cool and supported Included 1. 5L Hydraulics reservoir with magnetic hipbelt bite valve attachment Large zippered main compartment with tool organization for tubes, levers, and pumps Easily accessible front pocket for quick access to small essentials Made with bluesign(R) approved recycled materials for durability and sustainability SPECIFICATIONSIntended Use Mountain Biking, Short Rides Capacity7 L (plus 1. 5L reservoir)Weight1. 16 lbs / 0. 52 kg (without reservoir)Dimensions8. 5" h x 12. 5" w x 6" d Included Reservoir Osprey Hydraulics 1. 5L Lumbar Materials Recycled high-tenacity nylon, bluesign(R) approved Warranty Lifetime All Mighty Guarantee | Osprey | Seral 7 | Raven Black | Hydration Pack | Nylon