Upgrade From The OEM - The sound of your headphones will be unchanged, which means they will keep great quality. The noise isolation will be better than your headphones used to be due to forming a better seal around your ear. Better Quality - Much better material than the original RS 175 ear pads The foam inside feels denser and springs back slower than that in the OEM earpads. These will give your headphones a more luxurious look and feel than the stock ear cushions. Soft And Comfortable - Very soft comfortable leather HDR 175 replacement pads, a real improvement over the vinyl composite stock ones, easy to wipe down unlike the original felt pads that soak up sweat and gather fuzz and lint. Perfect Fit - replacement for Sennheiser RS 175/RS 185 /RS 195 /RS 165, HDR 175/HDR 165 /HDR 185 /HDR 195, TR 175/TR 165/TR 185/TR 195 headphones. (The TR model refers to the transmitter, the HDR refers to the headphones and the RS refers to the entire system)