Booklet Grip-Seal Envelopes are durable all-purpose mailing envelopes. Ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. Open-side closure is designed for easier insertion and retrieval of contents. Envelopes feature are easy to seal with Grip-Seal. Simply peel off release strip and press down for a quick, secure seal of the gummed flap. Envelopes are made of white wove stock. 24 lb.