Bertoia Diamond Seat Pad is a seat pad that complements the Bertoia Diamond Chair from Knoll. The pad provides a warmer and softer seat while protecting the chair's surface from scratches and wear. This version of the cushion is suitable for indoor use and is available in a choice of colors.

Bertoia was best known as a sculptor and designed only one furniture collection. Although he did not work primarily as an interior designer, his furniture was highly regarded and is still sold around the world today.