The highest quality memory foam, slow rebound and zero pressure, will not flatten over time like a standard foam cushion, breaking through the limitations of U-shaped cushions.Hollow design. Innovative hollow ventilation space for hemorrhoids, sensitive prostate, relieve stress.Very suitable for any chair, car , truck , wheelchair, aircraft . Correct sitting postureAccording to the natural curve design of the human spine, the pressure of the spine is reduced, and the S curve supports.Breathable sweat-absorbent, high-quality natural knitted cotton fabric, ion transfer PU film.Colour:Black+greyMaterial:cottonSize:40 x 38 x 10cm Package Contents:1 * cushionOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.