Thorlo Tennis Micro Mini Level 3 socks Heavyweight padding to protect against shock and impact Extended padding over toe protects against fast stops and and starts and lateral movementLevel 3 Maximum Protection1 Extra THORLON provides maximum tennis density padding for better durability protection against shock impact and shear forces2 Lightweight padding in arch for better fit and arch support3 Extended lightweight padding over toe to protect against fast stops and starts4 THORLON top with added spandex provides protection and better fitAverage Fiber content 88 ThorLon 10 Stretch nylon 2 SpandexSmall Youth 134 Womens 46Medium Mens 5585 Womens 6510Large Mens 9125 Womens 10513