The sleek uppers utilise a resilient polyurethane-laminated material combined over a comfortable mesh, resulting in reduced yield and providing long lasting foot support where it’s needed most. The fit is practical and quick fine-tuned using the single bi-directional BOA Li2 Fit System. At the base, the R2 outsole’s engineered carbon fibre layup saves weight and delivers a stiffness index rating of 10. A wide vent inlet and deep internal channelling provide cooling airflow, aiding in temperature regulation. PU laminate over mesh upper. Li2 BOA Fit System. R2 outsole – full carbon unidirectional. Outsole stiffness index 10.