adidas Adizero MD 2 Running Spike Airmesh Upper/Perforated Inlay - Allow air to fully permeate the shoe's interior, thereby promoting a cooler, drier and altogether more pleasant environment that is free from blisters. PEBAX Outsole Plate - Toughens the shoes' construction and torsional stability without adding undue weight. Removable Spike Design - A six spike configuration enables the athlete to dictate which of the outsole areas yield the most traction, allowing them to tailor the shoe to their own, individual style. Synthetic Microfibre Interior Lining - Encases the foot with a soft, glove-like fit. EVA Insole - Cushions the foot and attenuates shockwaves superbly.