Quality Park 9 x 12 Ship-Lite® First Class Mail Catalog Envelopes with Self-Seal Closure - First Class Mail - 9" Width x 12" Length - Self-sealing - 100 / Box - White

First-class SHIP-lite Envelopes offer a reinforced, multilayered paper material for mailing and a moisture-resistant, water-resistant surface. Other features include a first-class border, convenient Flap-Stik self-adhesive closure and patented easy-opening release strip for quick, easy accessibility.