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 surface of the chair from scratches and wear. This version of the cushion is suitable for outdoor use and is made of durable vinyl. The Bertoia Diamond Seat Pad is available in black and white and is also suitable for indoor use.

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