Hanes Premium Performance 6-pack Lightweight Invisible Liners have non-slip heels to keep socks in place for all day stay. Compression arch gives a performance fit around the foot. Wicking Cool Comfort fabric helps keep feet cool and dry. With X-temp More than Cool technology, these socks are designed to adapt to body temperature for all day comfort. Lightweight, non cushioned support for comfort without bulk and sneaker cut to remain invisible in shoes.