These are Officially licensed DC Comics Flash socks, guaranteed or your money back!. The Flash is known as the fastest man alive and is a founding member of the superhero team, The Justice Leauge. This no-show ankle sock set features 5 pairs with each set having their own design based on the superhero The Flash, such as a Reverse Flash pair, a S.T.A.R lab set, allover logo designs and more! You can mix and match for those quirky feeling days. Made of soft 98% Polyester, 2% Spandex. These are sock size 9-11 which fits men's shoe size 5-9 best, and women's shoe size 5-10 best