UltrAspire - Zygos 4.0 Race Vest - 14L

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  • Regular price $265.00

  • UltrAspire - Zygos 4.0 Race Vest - 14L

    Bryce Thatcher’s pack of choice, the Zygos 4.0 hydration pack is very versatile. This pack is lightweight and high capacity, a comfortable wrap around style with full compression allow for the lowest profile empty or fully loaded. The Zygos 4.0 comes with a 2L reservoir and a magnetic clip to keep your hands free. New expandable mesh on the back panel gives 4 liters of extra capacity as well as storage in the front with extra pockets. Whether you are fastpacking, mountain biking, in a fast race, ultra race, or summit assault this hydration backpack is the solution for any athlete. Now available in five sizes.

    Race Line: Built for the competitive athlete. Our Race Line focuses on Ultra & Trail running but can be used in any running scenario. Our Race Line products are sized to fit the athletic body, feature UltrAcool technology for maximum breathability on all race vests, made with very lightweight material for comfort during long distances, and created for pure performance.

    • Recommended Use:
      Versatile Pack utilised in any run scenario, training or racing.


      • Lightweight, soft, breathable, but strong, large-holed mesh pulls moisture away from the body to keep skin dry and cool.
      • Silicone and PU coated feather-weight nylon fabrics resist water, abrasion and tears.
      • Max O2 Sternum™ for unrestricted breathing while maintaining a stable pack. Uses shock cord with good stretch for unrestricted breathing but also good rebound on the stretch for a stable ride. Patent Pending.
      • Plush feeling micro-fiber polyester edges, soft and non-abrasive against skin and clothing.
      • Sweat proof webbing—won’t absorb water or get saturated and heavy.
      • Safety stitched bar tack on all stress points.
      • Quiet, bounce free, easy to see and use, zipper pulls.
      • Zig zagged stitching over elastic for ultra-durability, increased stretch and rebound.
      • Simple, fast, easy in and out bladder attachment.
      • Magnon pocket for sweat-free pills, with automatic magnetic closure for rapid access to pills and other essentials. Patent pending.


    Fit:  Unisex
    Size(s):  2X Small (26″-32″)
    X Small (28″-34″)
    Small (30″-36″)
    Medium (32″-38″)
    Large (34″-42″)
    Color:  Pitch Black, Emerald Blue*
    Hydration (included):  2L Reservoir with mag-clip to secure hose.
    Bottle Compatible (not included):  UltraFlask, Formula 250, Human 20 oz 2.0, or Collapsible Bottle
    Capacity: 854 c.i. (14L)
    Weight: 454g (including reservoir)
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