Melas Microfiber Opaque tights are model AT-636. These are opaque, 60 denier, with control top, and a velvet soft opaque leg. These are one of the most popular opaque black tights on the market. They have a long waist. For a little bit stronger control top try the Memoi MO-646. But the control top on the Melas product is fine. 83% Nylon, 16% Spandex, 1% Cotton.