SECOND SKIN Surgical Grade 20-30 mmHg Pantyhose Once you try on these Second Skin medical pantyhose, you won't believe how relaxing and comfortable they are. Designed specifically for those with deep vein thrombosis and chronic venous insufficiency, these medical support pantyhose are made from 80% Nylon and 20% Spandex, so you can be sure you'll be getting maximum levels of breathability and mobility.