Expandable fit made of rip and water resistant Tyvek material with self seal flap.
Strong, lightweight envelopes made of Tyvek® material are half the weight of heavy-duty paper envelopes; save on postage with every mailing.
Envelopes made with Tyvek® repel water and resist acids, bases, salts, rot, mildew and stains; perfect for storing taxes and essential papers in the home office.
Redi-Strip ® envelopes seal tight to keep contents safe