Our Herman Miller Chair Replacement Arm Pads are easy to install, replacing broken or worn-out arm pads on Size A, B, and C Herman Miller Classic Aeron Chairs including task and stool variations to make your chair feel like new again. See the difference between Version 1 and Version 2 in the photos. This is version 2, softer and more comfortable. Quick and easy installation. Polyurethane foam with an uncoated finish for added comfort. Vinyl arm pads last longer and are softer to the touch than competitor arm pads. OEM-quality aftermarket office chair replacement parts. Not satisfied with your chair?