UltrAspire Zygos 2.0

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  • $299


NOTE- Comes with 2 X UltraFask, not hydration bladder.

UltrAspire Zygos 2.0- Light and sleek aerodynamic efficiency one with air and earth. Instinctual, intuitive, primordial—a tour de force. You are the Zygos.

Lightweight, high capacity, wrap around style with full compression for lowest profile empty or fully loaded. For a fast race, ultra, summit assault, overnight “fast-packing” and even mountain biking. Now carry Z poles, and access bottom zippered pocket on the go.

Bryce Thatcher’s pack of choice. Available in three sizes for a more comfortable and solid feel and fit.

Product Description

Recommended Use:
50k to 100 mile Ultra trail racing in high mountains or with required gear lists


• 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):  Small, Medium or Large
Color:  Luminous Blue/Precipitous Blue
Hydration (included):  2 X 550 UltraFlask's
Hydration Compatible (not included): 2L Bladder, Formula 250, Human 20 oz 2.0, or Collapsible Bottle
Capacity: 570 c.i. (9.34 L)

Additional Information


Luminous Blue/Precipitous Blue


Clothes Stash, Credit Cards, Gels and Foods, Hydration Ready, Keys, Phone or Personal Device, Pills and Electrolytes, Size

Fluid Capacity

1100ml- 2 X 550 UltraFlask

Total Volume

9.34 L

Product Dimension (inches) LxWxH

16.25×1.5×19 (large)

Weight (Includes Reservoir)

14.0 oz (396 g)


Large (Chest size: 32″-42″), Medium (Chest size: 30″-38″), Small (Chest size: 26″-34″)