What is Class 1 (20-30 mmHg) and Class 2 (30-40 mmHg) and how is compression defined?

Class 1 compression provides 20 to 30 millimeters of mercury (mmHg) pressure at the wrist (and/or fingers and palm, depending on whether you wear a gauntlet or glove). The compression will reduce as the garment moves your arm toward the body. Ideally, a 20-30 mmHg sleeve will have 20-30 mmHg pressure at the wrist (or fingers/palm), then a gradual reduction in pressure of at least 5 mmHg per measuring point. The reduction in pressure will help push the lymphatic fluid up to circulate toward your body.

Class 2 compression provides 30 to 40 millimeters of mercury (mmHg) pressure at the wrist (and/or finger and palm, depending on whether you wear a gauntlet or glove), the compression will reduce as the garment goes up your arm toward the body. Ideally, a 30-40 mmHg sleeve will have 30-40 mmHg pressure at the wrist (or fingers/palm), then a gradual reduction in pressure of at least 5 mmHg per measuring point. The reduction in pressure will help push the lymphatic fluid up to circulate toward your body.

As a basic rule of thumb, Class 1 (20-30 mmHg) is generally for preventative wear for those at risk for swelling and for minor swelling, and Class 2 (30-40 mmHg) is for more severe edema. Your doctor and/or therapist will recommend a garment you will actually wear and that will benefit you more as a part of your self-care and management plan. Please consult your doctor and/or therapist when deciding which compression class you need to manage your existing swelling or lymphedema risk.