Antidecubitus cushion made of natural rubber, designed with interconnected air cells whose seal is of high and resistant quality. The cushion is available with single valve or dual valve or 4 valves in differentiated sectors. The honeycomb shape of the cells , inflated with air, allows to balance the position and the management of the contact pressure; also it allows an optimal adaptation to the anatomy and to the body movements, with a reduction of the friction and the shear forces and an improvement of transpiration. This particular structure facilitates the air circulation and the maintenance of an optimal microclimate inside the cushion, preventing the skin maceration. The PL9000 structure acts effectively on the uniform distribution of pressure on patients also with a very high body weight, in any position and after any movement. The cover is made of 95% polyester with silver threads and also has a polyester / PVC non-slip bottom to allow a safe and stable anchorage to the chair. It is removable and washable up to 30 ° in washing machine.