Varcoh Support Stockings: Affordable, Stylish Compression Socks. Great Customer Service & Easy Returns! Compression socks and stockings apply gentle pressure to your legs and ankles, promoting blood flow from your legs to your heart. Support compression stockings are made available in multiple compression support levels. Most commonly compression support stockings come in mild (8-15 mmHg), Medium (15-20 mmHg), Firm (20-30 mmHg), X-Firm (30-40 mmHg) gradient compression levels.