| Fit | Unisex |
| Size(s) | 2X Small (26"-32"), X Small (28"-34"), Small (30"-36"), Medium (32"-38") or Large (34"-42") |
| Color | Pitch Black |
| 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 |
ULTRASPIRE Zygos 4.0 Hydration Pack: product description
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. The 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.
Hydration Packs details:
