The mat is composed of soft TRS mousse which, associating a good TRS suspension, allows an optimal entrainment. This small device for musculating the thighs has very effective protection points in foam, exterior up to 30mm, comfort for traction, strong capacity for deabsorption of transpiration, increase friction, increase secretion. Due to the density steel base, the spring does not dform pas, the kind that supports plus weight, is robust and durable, as well as resistant to rain and falls. The spring does not cause any noise, which makes the entrainment pleasant.Design compact: lighter and portable, comfortable to use and easy to range. Design in the form of S, good elasticity, strong resistance, long term use of this product to refine the legs and reduce the fat of the thighs. You can take this device of entrainment almost everywhere and use it.