PUMA Bolt Evospeed Electric V2 Running Spikes Upper - Supple aerodynamic Clarino Rovenica synthetic upper hugs the foot and locks the foot onto the plate. Lace-up front offers an adjustable fit. Microfiber and suede lining provides a soft on-skin feel. Midsole - Racing last with a more curved and rounded bottom, and a lower instep midfoot fit offers optimized stability. Outsole - Full-length Pebax spike plate is built with an 8-Spike configuration.