The stiff and sturdy construction of our 100% Recycled Rigid Mailer ensures you will be able to ship your art prints, photos, and documents in confidence. Our insuperable paperboard will effectively resist bending--you can rest at ease knowing your contents will stay flat in transit. The larger sizes feature clever creasing which allows for expansion when stuffed with thicker items. The unvarnished board has a high-end, organic, and earthy feel. EcoEnclose 100% Rigid Mailers are an ideal marriage of high performance, appealing aesthetics, and eco-construction.