Grumbacher Watercolor Pads hold 140 lb (300 gsm) cold press watercolor paper with optimized sizing for good wet and dry lifting. The wire-bound pads feature patent-pending “In & Out” pages that allow you to remove sheets from the pad for painting, reworking, scanning, and more, then return them to the pad for transporting and safekeeping. These Watercolor pads contain 30 sheets of 140 lb. (300gsm) Cold-pressed paper Developed with an optimized sizing level to ensure good wet and dry lifting