Product Compression Levels

What is mmHg?

mmHg stands for millimeters of mercury and it is a measurement of pressure. In addition to being used on compression socks, it is also used for blood pressure readings. Common levels for compression socks include; 8-15mmHg, 15-20 mmHg, 20-30 mmHg and 30-40 mmHg. Compression socks provide graduated compression so mmHg is listed as a range. Below are general rules of thumb for compression range use:
  • 8-15 mmHg: Very light compression grading. Typically used for minor or occasional swelling
  • 15-20 mmHg: Most common OTC compression grading. Typically used for daily wear, travel and sports. 
  • 20-30 mmHg: Highest level of compression without a prescription. Typically used for daily wear, sports recovery, medical recovery and can help to manage mild symptoms of varicose and spider veins
  • 30-40 mmHg: This compression level requires a prescription. Typically used for serious conditions such as blood clots (DVT), severe swelling (edema), and severe varicose veins.

Does it Matter?

Yes, choosing the right level of compression is important. With the wrong level of compression the socks won’t be as helpful and could even cause harm. Since they work by compressing surface veins to assist with circulation, socks without enough pressure won’t be helpful. Too much compression can completely cut off circulation.

See our page on Compression Zone Technology® to learn more about how OS1st integrates different levels of compression to where it's needed most and see below for compression levels for their products: