Additional underfoot support for running, hiking, or weekend exploration, this full-length insole contours to the shape of your feet to absorb impact without sacrificing flexibility or stability. Designed for breathability and natural odor control, it’ll keep you fresh and cool on the trail or in town. Men's sizes: Small = 6.5-8, Medium = 8.5-10, Large = 10.5-12, X-Large = 12.5-14