218678BLU_65 Features: Your feet are kept cool by the well-ventilated, perforated Perflex upper Get solid purchase on holds, whether in the gym or out at the crag with 35 mm Stealth C4 rubber outsoles Keep the shoe securely fastened with the dual hook-and-loop Velcro brand closures Slip them on with the dual pull tabs Specifications: Upper: synthetic Lined: no Sole: rubber