A flat knit upper is divided into zones for stretch, insulation and breathability where you need it. Added structure and thickness of foam in the collar for greater strength and comfort when landing on the heel. The EVA outsole gives each step more bounce and flexibility. Softer and lighter, the one-piece Flow midsole provides responsive and long-lasting cushioning. Flow technology makes movement lighter and more comfortable on any surface. The outsole pattern is extremely durable and grippy for a smooth and natural step.