·100% Cotton Paper: 140lb/300gsm thickened blank watercolor paper, acid-free, highly absorbent with minimal bleed-through, resistant to aging and moisture. Colors blend naturally with rich layering, producing vivid shadow effects, durable for long-term preservation without fading.

·Cold Pressed Medium-Coarse Textured: Pure cotton watercolor paper compatible with dry and wet painting. The medium-coarse texture delivers both natural washes and sharp dry-brushing details, creating a premium feel. The colors are rich and vibrant with outstanding color rendering. Suitable for watercolor, acrylic markers, gouache, pen, colored pencil and mixed media techniques.

·Unique Accordion-Fold Design: Unfolded dimension: 5" x 33" , featuring 6 pages long continuous pages unfolded which are perfect for creating long scroll landscape paintings, urban sketches, and multi-panel story illustrations. Flattens completely to 180° without creases, enabling large-scale artwork creation and color contrast without detaching pages. Double-sided usable paper provides ample creative space.

·Portable & Practical: Measuring 5"x7" when folded, this accordion watercolor sketchbook is an excellent choice for mobile creation. Lightweight and compact when folded, which is ideal for travel sketching, outdoor painting, and quick sketches. The hardcover effectively protects the inner pages, and prevents pages from falling out, allowing you to create with peace of mind anytime, anywhere.

·Versatile Universal: The professional watercolor concertina sketchbook is designed for watercolor painting, suitable for beginners, student practice, illustrators, artists, designers, art exams and watercolor enthusiasts. Supports acrylic markers, ink, charcoal, sketching, printmaking or quick studies, providing a solid, smooth surface for creation. Whether used in art studios, for outdoor painting, or as a gift, it delivers exceptional expressive power.