A ring represents a square with corner posts. The corner post is made of a pipe with a diameter of 102 mm. For the suspension of the ropes, there are eyelets on the post. To ensure the necessary rigidity, the posts are additionally fixed by stops. The space inside the square is filled with polyurethane rubber of secondary foaming 12-15 mm thick and is covered with a PVC cloth. The fabric may be of any color. The joining of PVC sheets is done by heat sealing. The ring is fixed by contact tape (velcro). On the perimeter of the ring there are 16 cables (4 per side). At the corners of the ring there are 4 corner pads. Angular pads in the opposite corners of the ring are red and blue. Corner pads of white color are installed in the neutral corners of the ring. The ropes of the ring are attached to the corner posts. The pillars are wrapped in PVC fabric covers. The lower rope of the ring is pulled at a distance of 400 mm. from the ring, the 2nd - at a distance of 710 mm. 3rd - at a distance of 1020 mm. and the 4th - at a distance of 1320 mm.