The most breathable version yet, the Nike Metcon 6 Mat Fraser helps keep your foot cool when you' re going full steam. It stands up to the push and pull of heavily weighted and high-intensity workouts, delivering stability and durability. Signature details nod to 4-time CrossFit Games Champion Mat Fraser and his"hard work pays off"mindset. The Coolest Metcon Nearly 18% more breathable than the Metcon 5, this version features lightweight mesh that keeps air flowing and your foot cool. A durable screen print reinforces the mesh without sacrificing breathability. Stability Under Weight A low, flat and wide heel creates a stable base for weighted exercises. A removable Hyperlift insert lets you adjust the height under your heel from one set to the next. Durable Traction Rubber tread on the outsole and up the side of the shoe provides traction on the ground and grip when you' re climbing a rope.