The Zoom Matumbo is the lightest distance spike Nike has ever made for the very best 1,500-10,000 meter track runners in the world. High-strength Flywire technology works to minimize overlays and maximizes strength and durability of the spike. Lightweight Flashion midsole foam provides great arch support and protection over any distance. Horseshoe Pebax® plate with four removable pins. Sharkskin heel pad delivers added traction and reduce weight. Wt. 3.4 oz.