8-15 mmHg graduated compression (class 1). Medically approved by quality certificates, includes ISO09001, ISO13485, CE, FDA. . Promote blood circulation to help blood flow from the feet back to the heart. . Suitable for work and leisure-suitable for work occasions or sports and leisure, hiking, sightseeing, or even walking to increase comfort. Effectively relieve fatigue, pain and swelling of the legs. Easy on & off, thanks to Polyamide and Elastane materials.