If your feet sweat when you ride but you don't want to compromise on performance, the FXXKN is the obvious choice. The FXXKN has a similar profile to the FXX. It features an elite R500 carbon fiber outsole for maximum energy transfer. The insole is contoured with heel support, therefore helping to increase blood flow, reduce blisters on the foot and ensure power transfers directly to the pedal.The new upper uses a triple layer of extra thick XD-Knit nylon yarn that is extremely breathable and keeps your foot cool even on long, hot rides. This seamless upper has a sleek look that is complemented by the only new Atop clamping wheel to optimize fastening in the critical zone of the foot. Also new is a performance cushioning insole for comfort.Weight 198 g