These are the perfect mid-calf performance sock to compliment the perfect performance shoes from New Balance like the 990, 928, 1540. If you purchase shoes of the quality that New Balance is known to produce, why skimp on the socks that you put in them. Socks can make as much of a difference as shoes can, to the right foot. Content is 93% Polyester 6% Rubber 1% Spandex