The PRIMA PLOT cushion, in viscoelastic memory foam, adapts to the morphology of people by a molding effect of the sacrococcygeal and ischial area. The mechanical properties of the foam ensure stabilization of the pelvis on the seat and improve the comfort of the person in a seated position. The PLOT, made of High Resilience foam, helps prevent vicious positions, stabilizes the sitting position and reduces retraction of the lower limbs. Its anatomical shape respects the curve of the thighs, it is adjustable in depth.