Upholstery: Furniture such as sofas and chairs covered in fabric, vinyl, leather or other materials.

Uprights: The outer vertical posts of a chair.

Urethane Foam (Polyurethane): Flexible polyurethane foam is used as a cushioning material in upholstered furniture seats, backs and arms. For seat cushioning, foams that have a density of 1.8 pounds per cubic foot or higher offer the best support and durability.