Designed for 60-400m events including hurdles and long jump the Nike Zoom Rival S 9 track spikes put the focus on fast. Because extra layers mean extra weight the Rival S 9 features a snug 3/4-length bootie upper that wraps the foot and moves with you as you run. This fleet-footed design is paired with an aggressive traction pattern in the outsole and an updated eight-spike plate that digs into the track and propels you forward accelerating every stride and helping you fly across the finish. 3/4-length bootie construction reduces weight and layers in the upper while wrapping the foot for a snug sock-like fit. Synthetic overlays in the midfoot and heel add lightweight durability and support. EVA sockliner forms to the shape of your foot delivering custom comfort and support. Durable solid rubber in the heel with horizontal traction pattern for increased grip on the track. Updated eight-spike forefoot plate for aggressive traction and explosive speed with every step. Includes 1/4 pyramid spikes and a wrench. Fits one size small. We suggest you order 1.0 size larger than your normal shoe size.