4Cats Watercolour Field Book has 24 sheets of acid free 140 lb. (300 gsm) cold pressed watercolour paper. Sturdy and elegant front and back covers with lightly stippled texture keep your artwork intact while providing a firm handheld drawing surface. Double wire bound strength for effortless 360 degree page turning. Thick gauge, coated wires will not easily collapse. Books are side bound for landscapes and seascapes. Paint or draw across each two-page spread to capture expansive panoramic scenes. Pack of 6 books.