These pads are made with 100% wind power - a pollution-free, renewable energy resource - perfect for the enviornmentally conscientious consumer. The tape-bound, heavy-weight white drawing board in the Smooth Bristol Pads is ideal for fine drawing techniques. Lightly textured, the surface of the heavy-weight, white drawing board in these tape-bound Vellum Bristol Pads is designed to accept a variety of media. Fifteen sheets per pad.