adidas - a Accelerate (Dark Shale/Energy/Cyber Metallic) - Men's: High-end materials, design and the new a technology make this shoe the top performer of all ambitious and competitive tennis players. Synthetic leather upper for light weight and durability. adiTUFF(tm) for best abrasion resistance in the toe area. Open-mesh nylon for best breathability and quick drying. Heel a for optimized energy use throughout footstrike. Textile lining. Molded EVA insole for anatomical comfort. Encapsulated midsole construction for enhanced fit and support. Full forefoot adiPRENE(R) plus for forefoot propulsion and efficiency. adiWEAR(R) outsole for best durability in high wear areas.