A close fitting lycra overshoe to aid aerodynamics a perfect addition if youre trying to save every second possible by improving the airflow and lowering drag over your shoesthe construction of the endura fs260 pro lycra overshoes is both aerodynamic of speed and breathable for comfort so there really isnt any compromise in use there are holes built in for the cleats and heel which improves the fit and longevity reflective taping is across he overshoes to help with visibility in low lig