adidas Running - a3 Transfer (Metallic Silver/Black/Metallic Silver) - Men's: Everyday training shoe for runners looking for a fast ride. It features a light, supportive upper with 360-degree reflectivity and a3(R) in the heel to cushion, guide and drive your foot. Upper: Reflective materials for safety in low light conditions. Inlay: Molded EVA insole for anatomical comfort. Midsole: adiPRENE(R) maintains forefoot propulsion and efficiency. Structured a3(R) elements for weight reduction and durability.