The Fits Light Runner Solid Low Socks are cushioned socks that your shoe will not eat. High impact cushioning only where you need it in the toe cup and the heel lock areas. The Light Runner delivers pavement-pounding performance in every stride. Features:Fits patented Full Contact Fit hugs the contours of your foot and stays put so there is no loose socks to rub you the wrong wayThis low cut sock will not fall down into your shoeToe and Heel Lock high impact cushioningNarrow welt just above the shoeSuper-fine Made in the USAMachine washableFabric: 73% Merino Wool , 21% Nylon, 4% Polyester, 2% Lycra Men apos;s Sizing by Shoe Size: S: 3 1/2 thru 5 1/2 M: 6 thru 8 amp;nbsp;8 1/2 thru 10 XL: 10 1/2 thru 12 1/2 XXL: 13 thru 15 1/2 Women apos;s Sizing by Shoe Size: S: 5 thru 7 M: 7 1/2 thru 9 1/2 L: 10 thru 11 1/2 XL: 12 thru 14 XXL: 14 1/2 thru 16 1/2