When your shipments need to meet military or government standards, a standard packing list envelope won't cut it. Mil-spec packing list envelopes are constructed to satisfy the rigorous documentation requirements of defense contractors, government suppliers, and GSA vendors, ensuring your paperwork is properly presented and protected in compliance with military specifications. Like our other packing list envelopes, these are pressure sensitive and adhere directly to the outside of a shipment. With heavy 2 mil poly construction, our mil-spec packing list envelopes guard enclosed documents from the hazards of transit.