Perforated writing pads are made using a 100 percent chlorine-free manufacturing process and certified by the Chlorine Free Association. Chlorine and its derivatives have proven to be very harmful to the environment, especially aquatic life. These pads feature a green leatherette strip embossed with both gold Skilcraft and recycle logos. Each pad contains 50 ruled sheets (5/16" line spacings) of a 20 lb. basis weight paper attached to a sturdy .050 cal backer board. Pads meet Executive Orders 13514 and 13423.