The specialized sworks sub6 is the most aerodynamically advanced lightest shoe we39ve ever produced the traditional lacing system cuts down weight while the warp sleevetrade lace covermdasha sleeve worn directly over the lacesmdashis 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 padlocktrade heel it maintains t