The men's New Balance LD5000v4 Long Distance Track Spike provides support an updated tongue construction for a secure midfoot wrap and barefoot-friendly fit, ensuring an optimized fit to energize your race lap after lap. Tech Specs & Features: Ideal for 3K - 10K racing. Skeletally-engineered FantomFit upper for ultra lightweight support and fit. Synthetic and mesh upper. Full-length Pebax® plate combining the perfect balance of traction, flexibility and speed. Removable 1/4-inch standard spikes. RL-1 shoe last. Weight: 4.6 oz. Size 9). Fit: True to Size. Outsole: Pebax® 4-Spike Plate. Upper: Synthetic.