Pearl Izumi Men's Tri Fly V Carbon Cycling Shoe 100% Synthetic Imported Synthetic sole 1:1 anatomic tri closure: eliminates hot spots and removes pressure from your forefoot (patent pending). fully lined mesh upper for barefoot comfort P.R.O 1:1 power plate: p.R.O grade uni-directional carbon for ultra-light stiffness: direct -venting technology for cooling and drainage Concave shaping for ultra low 7.0 millimeter stack height, enhanced plate stiffness and anatomic support Built in longitudinal arch support for optimal support, power and efficiency Now with replaceable heel bumper. Dual density ethylene vinyl acetate insole for superior support