ALLBOARD ENVELOPES - The original All-Board mailers are manufactured in quality 500 micron 350 gsm GD2 fully coated white lined chip board.  A heavy duty white board envelope, manufactured with hot melt glued seams and hot melt peel and seal flaps with easy lift silicon paper strips or robust tuck in flaps.  The All-Board mailers offer an excellent coated surface for printing, document security, superior product protection and are tamper evident.