Versatile entry-level spike - Designed to perform for distances from 100 meters to 5K, for the 110 meter hurdles, and for jumps. Closed single layer mesh upper - For protection and breathability. Lace closure, with tongue tacked down on medial side - For a better fit. Die-cut EVA sockliner cemented to the strobel board - For a snug fit. Die cut EVA midsole - For just enough cushioning for a variety of events.