Fit Size A, B, and C Herman Miller Classics Aeron Chair, task and stool Chair. These arm pad relieves pressure between your arm and elbow by providing cushion, you feel comfortable in your chair. 100% Polyurethane finish with leather finish. Arm Pads contours to your elbow and arm to relieve pressure points. Only available for the old classic aeron chair, can’t fit the remastered aeron. Herman Miller Aeron Chair arm pads for classic Aeron chairs and stools are polyurethane foam with leather finish that’s comfortable to the touch. Your elbows will thank you. Consensus here at the office is that the leather arm pads last longer, are more comfortable to the touch, and make the chair’s user feel special. The Aeron Chair Arm pad set comes ready to be attached to your Aeron, with all the comfort of new pads just waiting for you to use The durable arm pads provides outstanding comfort and long-lasting wear in all work applications.