Cheshire Mailers envelope stiffeners are quick, convenient, inexpensive, lightweight and reusable. Envelope stiffeners are placed inside a paper envelope for mailing to provide extra rigidity and help prevent bending and folding of the envelope contents. They offer the most versatile, inexpensive and complete mailing protection for currency, stamps, postcards and other similar paper collectibles. These envelope stiffeners are made out of recycled materials and can be reused many times. Folding style envelope stiffeners are scored down the middle and easily fold in half. Collectibles are placed in the middle providing a layer of rigid cardboard protection on both sides. They are brown on the inside and white on the outside. They are completely blank so that shippers can add their own branding, advertising or messaging if desired.