Made of 100% cotton, this smooth, semi-transparent, acid-free 13.5 lb. paper is designed to accept heavy coverage of felt tip markers without bleeding. It allows color to flow smoothly and stay vibrant without feathering. It was developed for designers and graphic artists to create layouts, rough comps and renderings. Excellent for use with permanent and watercolor markers; also suitable for pencil, charcoal, pastels, pens and ink. 50 tape-bound sheets per pad.