These black opaque tights are a little tightening (size 1-2 is correct if it is less than 1.70 m and less than 60 kg.) For the curvature effect. Mode of action: - Caffeine microcapsules to fight against cellulite (that's to do with the time!). - A heat effect (IR produced by the body are diverted to the skin) - A massaging effect (so you have to move !!!) They feel good and leave the skin soft when removed. Waiting to see what happens on cellulite, we can already say that the appearance of the skin is improved. Can be washed 30 times at low temperatures. I recommend washing by hand, less aggressive for the product and therefore better durability over time, especially as they have a tendency to rub off.