Ultraspire Zygos 4.0 Hydration Pack (Large, Pitch Black)

About this item

• Pockets for Easy Access and Different Bottles: Includes 8 pockets for on-the-go use, such as 2 zippered shoulder pockets, a dual 4-way stretch mesh pocket, 2 stretch mesh pockets (1 with zipper for large cell phone), a zippered side pocket, and a magnetically closed side pocket. Compatible with UltraFlask, Formula 250, Human 20 oz 2.0, or Collapsible Bottle (bottle NOT INCLUDED).
• Insulated Bladder Compartment - Made of Mylar, the insulated compartment reflects and traps temperatures to help keep fluids hot or cold.
• ErgoFit - The human body is complex with intricate detail and function. The same attention to detail is present in the design of our packs to enable precise movement, contact, and weight distribution which ensures that there is never any inhibition to the biomechanics of the human body.
• Reinforced Main Back Compartment - The main back compartment has been reinforced at the stress points with XT fabric which contains stronger than steel ripstop fibers. This pack includes a 2-liter reservoir that fits into the removable insulated bladder compartment.
• MAX02 Sternum - The Max02 Sternum is a shock cord securing system that helps create a comfortable & natural breathing pattern while at the same time keeping the pack secure. The shock cord allows for stretch outward and 100% rebound which keeps the pack snug against your body empty or fully loaded with no restriction of movement.