With a double welt top, fit and arch support for reduced foot fatigue, this 7" very lightweight hardcore hiking sock actually increases circulation while regulating foot temperature and repelling moisture. Odor resistant, breathable, smooth toe seam. Hiker height, men's sizes M (5-8), L (9-12), XL (13-15). Made in USA of 77% Polypropylene, 17% Nylon, 3% Elastic 3% Lycra.