Nathan X-treme mountain biking pack has the most stable pack ride, with the least bounce, of any pack on the market today thanks to the X-Factor harness technology. By creating crossing "X" straps that go from one shoulder to the opposite hip it creates a higher level of security and fit, plus it stops pack bounce altogether.

Heart Rate Watch Company founder Rusty Squire made the podium racing at the US NORBA Nationals and calls this, "the single best mountain biking pack I have ever seen for long rides or day excursions". The Nathan X-treme hydration pack has all the great features mountain bikers want - front pockets with see-through mesh for easy access to gels and tools, water and energy, loads of storage for rain gear and food and the most secure and comfortable fit out of all the mountain biking pack manufacturers.

Top Nathan features such as Titanium Belts and Airmesh backing keep XC Race Series packs cool under pressure. To design a mountain biking pack that is incredibly stable while allowing for full range of motion, Nathan has developed the unique X-Factor Harness. It crosses the body for a solid ride and dispersed weight distribution, and offers a handy, easy-access pocket.

Planning for unexpected weather or mechanical issues is necessary for a day on the trails. The X-Treme offers the most comfortable way to carry gear without sacrificing your speed or range of motion.

Here are some of the awesome X-treme features:

* X-Factor Harness with adjustable shoulder straps to create a custom fit for every user
* 100 ounce Hydration Bladder with a Slide seal top closure and bite valve
* Tube clip and routing
* Quick access bladder pocket
* Zippered main compartment, expandable stash pocket, and small zippered compartment
* External see through mesh pocket
* X-Factor harness front pocket with outer mesh storage
* Zippered pocket for small essentials
* Mesh shoulder straps and back panel add comfort, prevent chafing, and dissipate heat
* Fully adjustable Titanium Belt
* Reflective detail for visibility in all light conditions
* 900 cubic inch capacity
* Weight: 20 oz.

If you'd like to talk about the Nathan X-treme hydration pack or any other hydration solutions then just call the experts at the Heart Rate Watch Company at 866-586-7129. We carefully evaluate hydration packs in the same way we evaluate a heart rate monitor, GPS watch or bike computer, which means we only carry gear that we have tested or use ourselves. This is why so many athletes are switching over to the Heart Rate Watch Company, it is because they know they can rely upon us to know the gear and give them the straight scoop.