Sketchbook Hahnemühle Watercolour Book is made of 100% cotton, featuring an A4 landscape format with 30 sheets of 250 g/sqm natural white paper. This paper is made of pure cotton (rag), is non-ageing, acid-free, and vegan. It has a fine-grained surface on both sides, making it ideal for all watercolour techniques, especially wet-on-wet. Masking pencils and tapes can be removed without leaving any residue, and etchings can be done easily thanks to the surface sizing. The sketchbook includes a black, sturdy cover, a black bookmark ribbon, and a rubber band fastener.