Based on scientific analysis, both the in and outsole on the New Balance Furon 3.0 has been developed to counter the forces that occur when accelerating - using them to your advantage. Therefore, the outsole is built from three layers: an inlay that offers directional traction, a nylon chassis for rigidity and responsiveness, and a TPU outsole for durability and flexibility. All three layers interlock, providing you with an outsole that features aggressive studs. The insole has been fitted with traction details, preventing you from slipping inside the boot. The area around the instep and toes is perforated for enhanced breathability, but also to reduce weight.