The Endorphin is the lightest spike on the market - thanks to its single layer of mesh and FlexFilm it weighs in at only 79 grams. Its 4-pin engineered spike plate not only reduces weight, but also maximizes traction and power. This running spike to help you reach new speeds and quickly approach the finish line. OVERVIEW ? Event: Track & Field ? Surface: Track ? Upper Details: single layer of mesh and Flex Film ? Bottom Unit Details: A 4-pin engineered spike plate SPECS ? Shoe Category: Track ? Pronation: Neutral ? Cushion: Plush ? Construction Type: Neutral ? Surface: Track ? Arch: High, Normal (Mid) ? Water Resistant: No ? Waterproof: No ? Weight: 2.5 oz. | 71 g.