The Balega Ultra Light No-Show Sock has a reinforced heel and toe will help the socks stand up to lots of use. The broad elastic arch support and heel tab will help to keep the sock firmly and place and prevent it from slipping into your shoe.Trademark Balega hand linked seamless toe.Unique triple Y heel creates a heel pocket which is ergonomically formed to the actual shape of your heel. In essence this creates a more formed and deeper heel pocket for ultimate fit and comfort..78% Drynamix® polyester, 20% nylon, 2% elastane.8924.