SIGVARIS Sea Island Cotton for Men Series 191, BlackSIGVARIS SEA ISLAND COTTON is knitted from the world's rarest cotton, that helps promote leg health by providing relief from tired, aching legs and swollen feet and ankles. Features in a variety of colours in a closed toe. Knitted from the world's rarest cotton Sea Island Sea Island Cotton yarn is lightweight with great strength, sily luster and incredibly soft feel Breathable and comfortable for sensitive skin Ideal for travel and everyday wear