compression socks' material are upgraded with nylon percentage from 40% to 85%, Delivers 360-degree stretch for greater flexibility and durability.breathable high performance fabric keeps an optimal temperature. Bacteria and moisture for maximum cotton level of comfort. They do not make your feet sweet
My socks are actually cooler than the thicker cotton socks I sometimes wear. I can actually feel the wind blow through my canvass sneakers when I ride my scooter. I will avoid wearing the black ones when in the sun, as dark colors absorb the sun's heat much more than white ones.