The super-light Core Plus has many features for better performance, such as the reinforced NRG Air Carbon sole with a stiffness index of 8.0 and 5 vents for perfect ventilation. The seamless unibody construction reduces pressure points. Four inserts made 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 a perfect fit.