adidas Running - a3 Axiom (White/Laser/Dark Metallic Silver) - Men's: Feel propelled through every foot strike in the a3 Axiom. a3 structured units in the heel provide a fast, responsive ride in this well-cushioned training shoe. Synthetic leather trims on the upper improve durability. Reflective materials for safety in low light conditions. Mesh nylon combines light weight and breathability. Molded EVA insole inlay for anatomical comfort. adiPRENE(R) insert for forefoot propulsion and efficiency. Structured a3 elements for weight reduction and durability. adiWEAR(R) outsole for best durability in high-wear areas.