What is a Corner Sofa Fabric? A corner sofa fabric refers to the type of upholstery material used on L-shaped or U-shaped corner sofas. These sofas are designed to maximise space and seating, while the fabric plays a key role in comfort, appearance, and durability. Common materials include soft cotton, durable polyester blends, textured weaves, and luxurious velvet. Choosing the right corner sofa fabric can enhance your room’s style and ensure your furniture remains inviting and long-lasting.