Libeth All in Motion™ Extended Size No Show Tab Athletic Socks - The All in Motion Extended Size Athletic Socks are made of polyester, nylon and spandex. The socks have moisture wicking properties, provide arch support and are a Fair Trade Certified product. They fit comfortably. There is a tab at the top of the heel portion to help prevent the socks from slipping. They barely moved after an intense aerobics class -- no need for adjustment. The package includes two pairs of white and gray socks and two pair of gray and pink socks.