The outer layer of Zeal X Corrugated padded mailer is kraft paper, corrugated lining, and the inner layer has a unique corrugated surface design to achieve the purpose of protecting the goods during transportation. It is 100% made of paper, all biodegradable materials, without any plastic. The liner is shaped like a W, also known as surf pad paper, a protective lining made of corrugated paper that gives the envelope strength and rigidity and is able to protect your product unharmed. The brown paper appearance can present high-quality images and provides an excellent surface for custom printing and writing. The self-adhesive strip means that the product can be packed in a few seconds, convenient and fast. Suitable for spare parts, hardware accessories, cosmetics, clothes, gifts, crafts and so on.