Size LG: 42-47 | Size MD: 37-41 Ultra-thin, lightweight construction for a barely there feel Locke-d-in fit design keeps sock securely on heel for an adjustment free fit that won't fall down Strategic mesh panels on top of foot for breathability Material wicks sweat & dries really fast Odor control technology reduces odor in the sock Seamless toe delivers superior comfort & reduced irritation Style #: 1387058 6 pairs of socks 96% Polyester/4% Elastane