Osprey Seral 4 Lumbar Pack



  • 15 ounces weight
  • Unisex
  • Mountain bike use
  • Colors: Red, Black, Green


SKU: N/A Categories: , ,


Riders looking for a low-profile lumbar pack with integrated hydration need to look no further than the Seral 4. This slim waist pack features a 1.5-liter bladder with our 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.

Best Use: Mountain Biking

Gear Capacity (L): 4 Liters

Gear Capacity (cu. in.): 244 Cubic Inches

Reservoir Compatible: Yes

Liquid Capacity (fl. oz.): 50 Fluid Ounce

Weight: 15 Ounces

Fits Waist/Hips: 26-50 Inches

Material(s): Recycled 600-denier PET polyester/recycled 400-denier high-tenacity nylon

Bite Valve Shut-Off Switch: Yes

Dimensions: 12.5 x 7.5 x 4.5 Inches

Gender: Unisex

Sustainability: Contains materials that meet the bluesign® criteria

Wide-Mouth Opening: Yes

Additional information


Black, Green, Red


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