High performance protection for even the most demanding users and the grueling conditions.. DuPont envelopes and disc packaging offer a wide array of solutions for your mailing and shipping needs. DuPont envelopes are considerably lighter than paper envelopes, and they’re considerably stronger. High-performance envelopes and packaging solutions from DuPont offer a superior strength to weight ratio. The legendary protectiveness of spunbonded polypropylene used in DuPont envelopes help make them incredibly light, which means significantly reduced shipping and mailing costs, plus they’re water resistant. When you’re sending something important, DuPont has a mailing and packaging solution that’s just right for you.