Osprey Seral 4 w/Res O/S (various colours)

A slim lumbar pack built around integrated hydration and trail-essential storage for mountain bikers.

The Osprey Seral 4 is a waist-worn hydration pack designed for riders who need a low-profile carry solution on the trail. The 4 L main compartment handles ride essentials — spare tube, CO2, multi-tool, and snacks — while the included 1.5 L Hydraulics™ reservoir keeps hydration accessible via a magnetic hipbelt bite valve attachment. Frameless construction and an AirScape backpanel keep the pack stable and close to the body over rough terrain.

Features

• Included 1.5 L Osprey Hydraulics™ reservoir with magnetic hipbelt bite valve attachment
• AirScape backpanel with contouring lumbar wrap for stability and fit
• Large zippered main compartment with reservoir sleeve, tool organisation, and internal zippered pocket
• Hipbelt pockets for quick-access storage
• Blinker light attachment point with reflective graphic
• Frameless construction with suspended mesh back panel

Technical Specifications

• Capacity: 4 L
• Reservoir: 1.5 L Osprey Hydraulics™ (included)
• Main fabric: bluesign® approved 100% recycled 600D PET packcloth, PFAS-free DWR treatment
• Floor material: bluesign® approved 100% recycled 400D high-tenacity nylon, PFAS-free DWR treatment
• Dimensions: 32 × 19 × 12 cm (W × H × D)
• Weight: 400 g
• Rain cover: not included