You've surely seen Sidi's Wire shoes, with their Boa closures and aggressively modern styling. If you're looking for the same performance, but prefer a slightly more traditional look, or a more traditional closure system, the Genius 6. 6 Vent is the ideal candidate. In fact, they are the Wire in everything but aesthetics and closure. Same sole, same vents, same heel retention, etc., but instead of the Boa, you'll find Sidi's famed Caliper Buckle and its reinforced High Security Velcro. All of these straps are highly padded, so that even if you like your shoes brutally tight, your feet will feel fine the next day. The Genius also features Sidi's Vent Carbon sole, with an air intake that can be easily closed off for training or racing on cooler days. The carbon fiber is incredibly stiff, as a whole, but Sidi engineered a small amount of flex at the toe area to allow the foot to move naturally, so it won't feel like you're pushing down on a 2x4 all day.