The s works sub6 is the most aerodynamically advanced lightest shoe weve ever produced the traditional lacing system cuts down weight while the warp sleeve lace covera sleeve worn directly over the lacesis win tunnel engineered to reduce drag and clean airflow over the shoe when combined with the narrower heel cup you can save up to 35 seconds over 40 kilometres when compared to the previous s works road shoe with the padlock heel it maintains the same secure and snug heel fit as the