About this item Ergonomic design: the seat cushion is low at the front and high at the back to adapt to the body shape. With hollow design, the ergonomic seat cushion reduces pressure on the sciatic nerve and relieves painful hemorrhoids. Ergonomic seat cushion for office chair car increases seating comfort and relieves the coccyx. Note: The seat cushion only relieves the pain, it is not a cure. High-quality material: orthopaedic seat cushion is made of high density and breathable memory foam, which springs back slowly and keeps the prototype intact. The product provides optimal comfort with sufficient support. .