Find your fastest times in the light, flexible, and breathable Men's FluidFlex F. K. T. Trail Running Shoe by Montrail. FluidGuide technology gives this minimalist like shoe a surprising amount of stability on uneven surfaces, and the FluidFoam midsole adds a touch of cush. Montrail cut grooves into the FluidFoam midsole for improved flexibility. The FluidFlex F. K. T. features a seamless upper made of mesh with a thin thermoplastic cage for durability and well ventilated breathability. There's a full length TrailShield sole for traction and rock protection, as well as Gryptonite panels at the toe and heel for enhanced traction.