Photo mailers are made of sturdy fiberboard for mailing photos or important documents that should not be bent. Convenient Redi-Strip closure requires no moisture to seal. Simply peel the strip off and fold the flap closed. Use tear-string for easy opening. Peel-off strip protects adhesive from dust for longer shelf life. Photo mailers are made with a high percentage of recycled material.Photo mailers are made of sturdy fiberboard for mailing photos or important documents that should not be bent. Convenient Redi-Strip closure requires no moisture to seal. Simply peel the strip off and fold the flap closed. Use tear-string for easy opening. Peel-off strip protects adhesive from dust for longer shelf life. Photo mailers are made with a high percentage of recycled material.