Compression Levels Explained: 15-20 mmHg vs. 20-30 mmHg vs. 30-40 mmHg

Compression Levels Explained: 15–20 mmHg vs. 20–30 mmHg vs. 30–40 mmHg

If you’ve ever shopped for compression stockings, you’ve probably noticed terms like “15–20 mmHg” or “20–30 mmHg” on the packaging. These numbers can be confusing at first—but they’re actually the key to understanding how compression therapy works and which product is right for you.

The abbreviation “mmHg” stands for millimeters of mercury, a unit used to measure pressure. The higher the number, the stronger the compression. Each level is designed for a specific purpose—ranging from daily comfort and prevention to medical recovery and chronic conditions.

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What 15–20 mmHg Compression Means

This is the most common and gentle level of graduated compression. It’s designed for everyday wear and prevention rather than treatment. Stockings with 15–20 mmHg compression help support circulation and reduce mild swelling or fatigue.

They’re ideal for people who spend long hours sitting or standing, travelers on long flights, or anyone looking to improve leg comfort at the end of the day. Many find this level perfect for daily use since it provides light support without feeling restrictive.

Typical benefits include:

• Relief from tired, achy legs

• Reduction of mild swelling

• Prevention of early varicose veins

• Support during travel or pregnancy

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What 20–30 mmHg Compression Means

This level offers moderate, medical-grade compression. It’s often prescribed for those with noticeable vein issues or moderate swelling. The 20–30 mmHg range improves venous return—helping blood move upward from the legs toward the heart—and reduces the feeling of heaviness or pain.

It’s the most popular “therapeutic” range because it balances strength and comfort, making it suitable for everyday wear among people with more active or demanding circulation needs.

Typical uses include:

• Varicose veins and spider veins

• Post-surgery recovery or injury swelling

• Moderate edema or fluid retention

• Support for standing professions (nurses, teachers, factory workers)

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What 30–40 mmHg Compression Means

This is a high level of medical compression typically used for advanced venous insufficiency or chronic conditions. It’s prescribed for individuals experiencing severe swelling, lymphedema, or deep vein thrombosis (DVT).

Because this range delivers strong, targeted pressure, it should generally be worn under medical supervision. Venosan’s high-compression garments are precisely calibrated to ensure comfort and safety while delivering the clinical benefits needed for advanced therapy.

Typical uses include:

• Severe varicose veins

• Chronic venous insufficiency (CVI)

• Lymphedema management

• Post-thrombotic syndrome

• Post-sclerotherapy treatment

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Choosing the Right Compression for You

Your ideal compression level depends on your symptoms, health history, and goals. If you’re new to compression wear, start with a lighter level (15–20 mmHg) and see how your legs respond. For medical use or moderate to severe swelling, higher compression levels may be recommended by your healthcare provider.

Remember that all Venosan compression stockings are lab-tested for compression accuracy, durability, and comfort. Whether you need light support for everyday comfort or high compression for medical-grade relief, Venosan ensures you’re getting exactly what your legs need.

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Quick Comparison

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The Bottom Line

Compression therapy works best when matched to your personal needs. Lower levels focus on comfort and prevention, while higher levels provide therapeutic relief for chronic conditions.

With Venosan’s Swiss-engineered precision and medical-grade quality, you can trust that each pair delivers consistent, effective support—no matter which level you choose.

Ready to find your perfect fit?
Explore Venosan’s collection of graduated compression stockings at venosan.us/all-products.