Series 4

Ultimate Direction, the world leaders in Hydration have released their much anticipated Series 4 vests. Designed by some of the leading Ultra Runners in the history of the sport, the Series 4 raises the bar in hydration vests. With the use of new ground breaking fabrics, overall capacity has slightly increased, whilst wait has decreased. Most notably is the new "comfort synch" technology positioned around the lower back which allows you to provide a custom fit with easy on-the-go adjustment.