Professional 100% Cotton Watercolor Paper-20 sheets of heavyweight 300gsm (140lb) paper with true 100% cotton content. Acid-free and archival quality ensures artwork longevity and superior pigment vibrancy. Captivating Water-Ripple Acrylic Cover-Features a unique gradient water-ripple design that creates dynamic light reflections during outdoor painting. Made of durable, scratch-resistant acrylic (Tip: Remove protective film before use for crystal-clear transparency). Practical Removable Page System-Ring binder design allows effortless removal of finished paintings without damage. Easily refill with compatible A5-size watercolor paper (8.3" x 5.8") for continuous use. Multi-Medium Versatility-Cold-pressed surface with balanced texture works flawlessly with watercolor, gouache, acrylics, ink, and markers. Perfect for studio experiments, travel journals, and plein air sketching Enhanced Painting Performance-Optimized cold-press finish provides excellent wash control and pigment adhesion. Prevents buckling even with heavy washes while enhancing color luminosity. watercolor paper