adidas Running - Response Trail XI M (Oxide/New Navy/Black) - Men's: Generations of testing have refined the original, authentic trail shoe to the point of near-perfection. Stretch tongue enhances the fit and the TRAXION&trade outsole grips any surface. Upper includes 360 degree reflexivity for safety in low light conditions. High-abrasion textile with low water absorption and sock-like fit. Molded EVA insole for anatomical comfort. Midsole features 3-D TORSION® SYSTEM for best midfoot integrity. adiPRENE(R) provides protection from harmful impact forces. adiPRENE(R) insert for forefoot propulsion and efficiency. Outsole features decoupled heel to deflect impact shock. Flex grooves for optimum forefoot flexibility. TRAXION outsole for maximum grip in all directions.