Spoil yourself or your loved ones with these truly luxurious black socks made with Peruvian baby alpaca yarn with some nylon reinforcement to provide longer wear. Baby Alpaca yarn (not from baby alpacas but a high quality alpaca yarn) is soft, supple and smooth containing microscopic air pockets which are perfect for retaining feet warmth. This business weight sock is not recommended for high abrasion use such as in work boots. A Health Sock® with no tight elastic top, which may be assist diabetics.