Product Details5 pack Material: Cotton, polyester and elastane Features Patterned Ribbed elastic welt 3 ply yarn in the heel for reciprocated heel and toe Rosso machine closure with soft seams for added comfort Additional Information Care instructions: Machine wash according to instructions on the care label By choosing our cotton products, you're supporting our investment in Better Cotton's mission. Visit bettercotton. org/massbalance to learn more. This product is sourced via a mass balance system and therefore may not contain Better Cotton.