FEATURES of the Pearl Izumi Men’s Tri Fly IV Carbon Shoe 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-Vent technology for cooling and drainage Concave shaping for ultra low 7 mm 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 EVA insole for superior support SPECIFICATIONS of the Pearl Izumi Men’s Tri Fly IV Carbon Shoe Weight: 270 g