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. Includes 1/4" pyramid spikes and a wrench. Wt. 4.7 oz. 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.