Dynafit Ultra 100 GTX trail running shoe was developed for all athletes striving to conquer ultra long distances. The maximum volume of the Ultra 100 GTX trail running Shoe guarantees a comfortable fit even after hours of running on challenging trails. The cushioning needed for long runs was a key focus during the development of the Ultra 100 GTX midsole. Combined with a Pomoca outsole, ultrarunners get excellent cushioning and superb grip on all surfaces and conditions. With the Invisible Lacing system, a stretch lace cover adds increased protection and keeps dirt and pebbles from getting into shoes. Another feature of the Ultra 100 GTX is the Dynafit Heel Preloader Technology, a design element that improves heel fit. With all of this technology, plus a Gore-Tex Invisible Fit membrane, the Ultra 100 GTX is the perfect overall solution for your next, long trail adventure – no matter what the weather.