This bright white, acid-free drawing paper is suitable for pencil, charcoal, pastel, crayon and marker. Spiral bound with micro-perforated sheets. Contains 30% post-consumer fiber. 80 lb / 30 sheets. The Strathmore Windpower line of artist papers have been manufactured with emissions-free, wind generated electricity. The manufacturing of this eco-friendly artist paper is certified through the Green-e Marketplace Program, administered by the non-profit Center for Resource Solutions. Strathmore pioneered the practice of using recycled pulp to make high quality fine art pads and they continue that tradition by offering 30% post-consumer waste in the Windpower Drawing and Sketch products. Strathmore’s commitment is to give artists the greener choices they want, with all the Strathmore quality they have come to expect.