Champion Men's double dry performance socks 3 pack (Bulk Packaging) nylon, cotton, polyester, acrylic, spandex Power cushion absorbs shock for nonstop comfort. Acrylic in sole wicks moisture for soothing coolness. Spandex throughout provides sleek support. Reinforced heel and toe resist wear &amp; tear. Rugged Performance Top offers stay-up fit. Smoothstitch? toe seam stays flat for chafe-free softness.