Mountain Equipment Company

Osprey Seral 4 Waist Pack - Unisex


Colour: Dustmoss Green

Size: One Size

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Available online

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Rocksolid guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, electronics, undergarments and swimwear excluded).
Really. If it's not up to snuff after you use it (a couple times) you can still bring it back. It lasts longer than 30 days, but not forever. We'll be fair about it.


A bum bag with a bladder? Yep. Osprey managed to tuck a 1.5L hydration pack into the Seral, with enough room for trail essentials. Lets you ramble without a backpack and without loaded pockets.

  • Padded air mesh back panel, for lightweight comfort and air flow
  • Rear pocket fits a reservoir with room for a snack, tools and spare tube
  • Includes Osprey Hydraulics® 1.5L lumbar reservoir by Hydrapak
  • Magnetic attachment holds bite valve for convenient grabbing
  • Reflective loop holds blinky light (not included)

Tech specs

Weight280g (Dustmoss Green One Size)
280g (Black One Size)
Ideal for
  • Mountain biking
Main fabric
  • 600-denier recycled polyester
Secondary fabric
  • 400-denier recycled nylon
  • Padded
Additional feature(s)
  • Reflective details
  • Hydration compatible (reservoir included)
Product sustainability
  • Bluesign® Approved Material
  • Recycled content
Made inVietnam

Reviews (15)

4 out of 5 stars with 15 reviews for Osprey Seral 4 Waist Pack - Unisex

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