Prefer an off-the-back hydration solution instead of an over-the-shoulder pack? The 7-liter Seral waist pack features a next-gen 1.5-liter Hydraulics reservoir and a zippered main compartment and hipbelt pockets fit your spare tube, patch kit, CO2 inflator and more. Compression straps pull the pack into your lower back and wrap around your hips for supreme stability, even over technical terrain. Lumbar CarryFor riders who prefer off-the-back hydration carry and the minimalism provided by a lumbar pack. Ride StabilityOur bike-specific, angled hipbelt and compression straps provide stability and comfort with a close-to-body fit. Reservoir IncludedA dedicated hydration compartment stores an included Hydraulics™ LT 1.5 L Lumbar Reservoir for short to medium rides and compresses for stable carry. Sustainable Design+ bluesign® APPROVED main body and bottom fabrics + GRS-certified 100% recycled main body and bottom fabrics + All DWR treatments made without PFAS + BPA-free reservoir. AirScape™ Lumbar BackpanelExtra-thick ridged foam with center air channel for excellent ventilation. HipbeltAirmesh wrap hipbelt with zippered fabric pockets provide stability and breathability, ErgoPull waist strap closure system allows for proper snug and stable fit. Features: AirScape backpanel with contouring lumbar wrap provides maximum stability Large zippered main compartment with reservoir sleeve Included Osprey Hydraulics 1.5 L Lumbar Reservoir with strong magnetic hipbelt bite valve attachment. Easily accessible zippered front pocket with internal tool organization Dual zippered hipbelt pockets Blinker light attachment with reflective graphic Specifications: Volume: 7.0 LitresDimensions: H 6.0 x W 12.5 x D 8.5 InchesWeight: 1.15 Pounds Fabric: Mainbluesign® APPROVED, 100% recycled 300D polyester, DWR treatment made without PFASLinerbluesign® APPROVED, 100% recycled 210D nylon, DWR treatment made without PFASBackpanel & Harness Meshbluesign® APPROVED, 100% recycled polyester SKUs10007290 (Raven Black)10007291 (Pediment Grey Dust Print)