The super lightweight Core Plus with plenty of features for even more performance, such as the reinforced NRG Air Carbon sole with a stiffness index of 8.0 and 5 ventilation openings for perfect ventilation. The seamless unibody construction reduces pressure points. Four inserts of breathable mesh and additional micro ventilation openings on the entire surface provide optimal ventilation.The SLW3 knob - the only one with gradual loosening or complete opening at the simple push of a button - ensures easy access and perfect fit. - Season: Spring/Summer - Size information: Size runs true to size - Fit: regular fit - Included in delivery: 1 pair - Purpose: road bike / cyclocross Weight - Weight per pair: 570 g Material Shoe - Upper: breathable mesh - Outsole: NRG Air Carbon - Features: wind resistant - Sole type: hard Equipment Shoe - Features: Toe cap/protection - Closure system: SLW3 twist closure with extra velcro - Closure system type: twist closure Pedal systems - Cycling shoe type: for clipless pedals road bike - Cleat fitting: for 3-hole cleats Cut - Fit Foot width: wide.