The NEW Signature Series 4 from Ultimate Direction have raised the bar in running hydration. If being designed by 4 of the greatest Ultra Runners of all time wasn't enough, some how they made it better.
Take note of the Comfort Cinch Technology which allows you to adjust the fit without having to stop running. This is essential because a pack will always change in size out on a run as your fluid levels drop, you add items from an aid station, remove items, eat items etc... your pack never stays the same. Being able to adjust the sizing easily whilst running ensures you encounter less bounce.
Lighter, more breathable materials and LOTS of pockets make this new range a WIN!