adidas Adizero Prime ltd-U 100% Synthetic and Mesh Importado Rubber sole Heel measures approximately 1.25" Weight: 8.2 ounces; Stack height: 27 mm / 18 mm boost's energy-returning properties keep every step charged with an endless supply of light, fast energy adidas Primeknit is carefully engineered to naturally expand with your foot while you run to give you a more comfortable fit and help reduce irritation Reflective metallic yarn in upper; TORSION SYSTEM for midfoot integrity ADIWEAR outsole offers the ultimate in high-wear durability; Continental Rubber outsole for extraordinary grip in wet and dry conditions