Help endangered species with our "Give Back" Biodiversity Footie Socks. 10% of all sales will be donated to The Center for Biological Diversity. They work to secure a future for all species, great and small, hovering on the brink of extinction. Our Biodiversity Footie Socks are made from organic cotton so soft and plush you won't want to take them off! Below the ankle stay-in-place height, with full foot padding, and nature patterns.