Product Details Fit-upgrading essentials: above-the-boot trouser socks flecked with rainbow colors. Cotton/polyamide/elastane. Do Well: by buying cotton products from Madewell, you're supporting our investment in Better Cotton's mission to help cotton communities survive and thrive while protecting and restoring the environment. This product is sourced through a system of mass balance and therefore may not contain Better Cotton. Machine wash. Import. MB652