There are different levels of compression. These are measured in millimeters of mercury (mmHg). The higher the mmHg, the higher the compression.    8-15 mmHg = mild compression.    15-20 mmHg = moderate compression    20-30 mmHg = firm compression    30-40 mmHg = Extra firm compressionCompression that exceeds 30mmHg at the ankle are more commonly reserved for individuals with chronic circulatory issues. Professional medical advise should be sought for products at these levels.https://www.2xu.com/ca/Compression-101.html