FLA Activa - Soft Fit Women's Microfiber 20-30 mmHg Compression Dress Socks (knee high) help to relieve and prevent leg fatigue and heaviness, ankle and foot swelling, and mild varicosities. These graduated compression socks are made of super soft microfiber. The microfiber allows the sock to feel extra soft and comfortable. Activa socks are ideal for use in graduated compression therapy. Ribbed style trouser sock. Firm support. Economical. 20-30 mmHg. Color: black, tan Pair.