Best for 100-400m the Saucony Showdown 4 is a light fast sprint spike that delivers when it counts. Lightweight FLEXFILM overlays in the upper and ISOFIT construction provide a supportive fit that locks the foot in place. Padded heel collar for a comfortable fit. 10-spike Pebax plate grips the track for fast explosive strides. Comes with 1/4 pyramid spikes and a wrench. Shipping to Canada is restricted for this product.