Since 1985, UD has been developing hydration packs for (trail) running and other outdoor activities. UD has been big on hip bags with drinking bottles from the start. Today, 30 years later, UD is the market leader in America with (trail) “vests”.

All UD products are developed by and for athletes. Some of the best (trail) runners in the world are involved in the development of the bags. A lot of time is put into testing by the athletes, resulting in great equipment for the most extreme conditions.

UD was the first brand to launch a specific women's trail running vest, the Jenny collection. UD also has the Scott Jurek and Anton Krupicka's vests.