EcoSox makes bamboo-based socks for everyday wear, outdoor activity, athletic use and foot-health needs, with viscose fibers derived from sustainable bamboo at the center of its designs. The brand grew out of BBS Hosiery, which began manufacturing and distributing hosiery in 1988, and EcoSox was established in 2008 as the company shifted toward higher-performance, more environmentally focused socks. Its Greenville, Ohio operation also ties selected purchases to tree planting and backs marked products with a lifetime blister-free guarantee.