The New Balance Women's WR1400DY Speed Running Shoes in high viz yellow feature three levels of visibility to make running in dark conditions safer. Built for speed and responsiveness, the shoes boast a breathable synthetic and mesh upper, whilst the REVlite® midsole provides lightweight stability. With a 10mm drop, they're the perfect choice for nighttime running. - L.M. New Balance Women's WR1400DY Speed Running Shoes. Glow in the dark construction. 3 levels of visibility to keep you safe. 10mm drop. REVlite® midsole for stability, responsiveness and performance. Lightweight design. Breathable synthetic and mesh upper. No-sew seams for added comfort. Weight: 201g. Brand: New Balance. Colour: Hi Viz Yellow.