These drawing pads contain 30 sheets of 70 lb. (104 gsm) black paper with a fine tooth texture perfect for metallic and gel pens, acrylic markers and colored pencils. Paper is beater dyed utilizing fade-resistant formulations guaranteeing longevity. These pads feature dual loop wire bound construction and "In & Out" pages (patent pending) that allow you to remove sheets from the pad for drawing, reworking, scanning and more. Upon completion, simply return the sheets into the pad.