Ludus E+ No-show Lightweight Ventilation Crew Socks The basic ideas of our crew socks are pure and simple. 73% of cotton, 19%of polyester, 8% of spandex. All socks are designed and manufactured in Taiwan with good quality control. For preventing the slippery, Ludus E+ crew socks use the extra compression structure around the feet area which makes feet movement lighter and reduces the pressure during the walk. Suitable for people who likes outdoor activities, fashion apparels and to show personal style.