Premium Polyester Sofa Arm Cover, Scratch Resistant Protector Covers, Washable, Elastic Armrest Covers for Square/Curved/Sloping Couch Armrests, 2Pcs (Khaki). Applicable Off Kinds Sofa Arm -- This practical sofa armrest cover is suitable for square, arc, oblique, wide arc and other types of sofa armrests.