Product Overview This foldable custom printed mailer box is designed for skincare and cosmetic products, apparel accessories, small gifts, and e-commerce retail shipping packaging. Made from thick corrugated paper or art card paper, it features an integrated self-locking folding structure that requires no glue for easy assembly. Full-color printing can be customized both inside and outside the box, including solid base colors, illustrations, brand logos, and inner slogans.