Subtle classic looks superb aerodynamics excellent fit and power transfer really does show that sometimes less is morespecialized have spent many long hours in the win tunnel that39s not a typo it39s the catchy name they have for the wind tunnel to come up with the s works sub6 their lightest and most aerodynamic pair of shoes ever the traditional lacing system not only cuts down on weight but helps with a close fit as they have six point of adjustment through the laceholes slip on