The adidas adiZero Adios 2 running shoe features an environmentally responsible, solvent-free synthetic Tirennina suede upper. adiPRENEï¿½ insert in the heel provides comfort and shock absorption. adiPRENEï¿½+ maintains forefoot propulsion and efficiency. Extended TORSIONï¿½ SYSTEM offers midfoot and forefoot integrity. Dual compound rubber outsole integrates sticky and blown rubber for a perfect blend of grip and cushioning. Continental Rubber outsole supplies superior grip in all underfoot conditions. Quickstrikeï¿½ gives best lightweight durability and flexibility. Wt. 6.3 oz.