The Asics MAGIC SPEED shoe is made for racing or regular training runs.It offers the versatility you need to move your body and your mind towards a new personal best.Made to propel your foot forward, GUIDESOLE technology is combined with a carbon forefoot plate.This creates a smooth-rolling sensation as you move through your stride.Traditionally, when you add more foam to a shoe, you add more weight.By stacking the midsole with FF BLAST cushioning, this material adds a responsive feel to your step while keeping the shoe lightweight.