The 20-30 mmHg level of compression is the first medical grade compression. It’s the most widely used medical grade because it provides competent compression to your legs without being too strong. The 20-30 mmHg level of compression is great for managing swelling in your legs, spider veins, varicose veins, travel, sports and after certain surgeries. Pregnant mothers are also finding the benefits of compression stockings and are starting to wear 20-30 mmHg to alleviate heaviness, swelling and aching in their legs. The 20-30 mmHg level of compression is available in a wide variety of styles for both men and women in knee high, thigh high, pantyhose and maternity pantyhose styles.