Training Chair with Armrest & Wheels is equipped with high - quality casters that are designed to provide a smooth and effortless rolling experience. The casters are usually made of durable materials such as polyurethane or rubber. Polyurethane casters are excellent for both hard floors (like tile or hardwood) and carpets, as they offer a good balance between smooth movement and floor protection. Rubber casters, on the other hand, provide better traction and are quieter, which is beneficial in a training environment where noise can be a distraction.