The Nike Zoom Rival D 9 Running Spike is designed from breathable and lightweight single layer mesh which regulates the air flow inside the shoe and protects your foot from sweating. Strategically placed flywire technology reduce the weight of the shoe and gives the extra support by locking down the midfoot. The midsole of the shoe designed from Phylon provides the extra cushioning and is fully breathable. Pebax ® plate with six removable spikes offers optimal traction and grip. The outsole of the shoe is constructed from 3/4-length solid rubber which offers the maximum durability and better traction.