Venoflex B/2 Incogn C F N stockings are one of Thuasne's proposals for those who need compression stockings. In this case, the reference bei/bron 3 refers to the colour of an article designed to help improve circulation in the legs. A product to choose from depending on the state of your legs. Varicose veins vary in severity. This factor will determine the weight of the stockings that are needed to prevent and mitigate the effects of these varicose veins or spider veins. Compression stockings in general and this model in particular help prevent the signs of circulation problems. They can be machine or hand washed and withstand temperatures up to 40°C.