The PROSTAND JMD-1315-8K is a vertical watercolor spiral sketchbook designed for artists and students who work with water-based media. Its 25 sheets of 180 g/m² watercolor paper are specifically treated to absorb moisture effectively, which helps prevent the page from warping or deforming during the painting process. Measuring 26 x 38 cm, the sketchbook features a plastic cover that shields your work from moisture and accidental damage. The spiral binding is particularly practical as it allows you to fold the book back 360 degrees, providing a flat surface and more freedom of movement whether you are sketching in a studio or outdoors using watercolors and gouache.