Riders looking for a low-profile lumbar pack with integrated hydration need look no further than the Seral 4. This slim waistpack features a 1.5-liter bladder with Osprey's updated high-strength magnetic coupling for improved hose management even in rough terrain. The Seral 4 has enough storage capacity for ride essentials, such as a spare tube, CO2 and multi-tool and, of course, snacks. Constructed with high-quality bluesign®-approved recycled high-tenacity nylon with a PFC-free DWR coating.

• Bike-specific, off-the-back carry, angled hipbelt
• Dedicated hydration compartment stores an included 1.5 L lumbar reservoir by Hydrapak
• Airmesh wrap hipbelt with zippered fabric pockets provide stability and breathability
• ErgoPull waist strap closure system allows for proper snug and stable fit
• AirScape backpanel with contouring lumbar wrap provides maximum stability
• Extra thick ridged foam with center air channel for excellent ventilation
• Magnetic hipbelt bite valve attachment
• Large zippered main compartment with reservoir sleeve
• Main compartment tool organization and internal zippered pocket
• Blinker light attachment with reflective graphic
• Constructed with PFC-free recycled bluesign®-approved nylon