This U.S. Postal Service Approved Over-the-Calf Compression Sock is lightweight, flame resistant, and abrasion resistant for long lasting durability. 65% Nanoglide, 18% Spandex, 12% Elastic, 5% Nylon-Comes in two colors, Black or White and two sizes, Medium (9-11) and Large (10-13).
It has the following features:
Arch support zone for maximum comfort.
Vented foot zone to release heat and moisture.
Nonoglide to help keep feet dry and prevent blisters.
Compression spandex throughout ensures stay-up all day.