Made from three-layer breathable elastic material. Composed of the three layers – elastic microfibre fabric, polyurethane foam and terry cloth – which facilitates rapid dispersion of sweat, greater elasticity and a better fit Features a silicone bubble grip to prevent slippage. Consisting of a patella pad, polycentric joint on one side with condyle airbag and inflation system, on the opposite side, it features flexible stays and 2 straps countering the inflatable bag, creating, by the pressure of the three points, as opening of the obstructed compartment.