These Mens Falke Keep Warm Wool Trainer Socks are anatomically shaped for a perfect left/right fit, and with smooth toe seams to prevent pressure, running or irritation while you are active. The knit includes a band in the arch and an optimised heel shape for hold to the foot without requiring silicone ‘strips to hold them in place like many under-ankle style socks do. There is also a cushioned sole for extra insulation and comfort. The Breathable merino wool can regulate temperature, so feet stay comfortably warm without overheating.