Earth-Friendly set of four highlighter markers. Marker tube with recyled paper reduces the use of plastic by 60%. Tube is lined with wax to retain moisture. Polyester fiber tip is filled with non-toxic, alcohol-based ink. No Xylene, Toluene or other VOCs here. Ink quality is excellent-- comparable to Expo 2. Bullet tip, 4 colors: yellow, blue, pink, green. Made in Sweden.