100% natural because it is made with GOTS certified organic cotton and dyed with a chemical-free process. This technique is sustainable, ecological and 100% natural, it offers a compromise between productivity and responsible consumption. It saves 30% of water and 30% of energy compared to a "classic" production. The dyeing process is GOTS certified, using clay as the main material and plant extracts to refine the color. Madder, for example, allows to obtain pinkish tints and walnut, it brings a brown coloration. The natural dye, is softer, you can see differences in bath between products and a slight discoloration of the products during the first wash. This is the beautiful imperfection of nature.