Shop quality seat foam at Foam Replacement. We offer a wide variety of premium foam, available in various densities, firmness, and styles. Our foams are ideal for making soft and cozy chair cushions, dining chair cushions, boat cushions and more. If we don’t have the chair cushion shape you’re searching for, no problem. We can custom cut any shape you need. We invite you to browse our selection of foam to find the support, comfort, and durability you need for your next sofa foam replacement or seat cushion.