The Colour Book collection: More than 120 effective wall hangings are included in this collection, each distinct in terms of color and texture. All of the shown materials are made of non-woven high-quality materials. No PVC is used in our non-woven materials, and all of our products are water-based. Furthermore, some handholding techniques are specifically addressed for optimal washability, stiffness, brittleness, and durability in this book. This environmentally friendly non-woven bag is a great replacement for vinyl handkerchiefs. The Color Book is the bible for high-quality, effective learning.