Technical stretch knit upper - this new upper material provides breathable comfort and a superior chafe-free fit. Heel Cap - An external heel that fixes the back foot for a non-slip fit. Lacing system - fixes the metatarsal for a distraction-free fit. Reflective details improve visibility in low light conditions. FlyteFoam Blast Plus midsole - new to Gel-Kayano 29 for light shock absorption and
