EnvyPak polypropylene envelopes and packaging are made of extremely strong, durable and recyclable polypropylene. Polypropylene is an inert material that makes EnvyPaks perfect for archiving and reuse as storage devices. Typical reuse examples for a pre-mailed EnvyPak envelope include storage for photos, coupons, small collectibles and receipts. Reusing reduces material consumption and saves energy compared to one-time use and throw-away alternatives. Booklet envelopes feature permanent peel and stick adhesive seal and perforations for quick and easy opening. 6.25” x 9” clear envelopes provide high impact for mini-brochure and booklet mailings because they allow for visibility provided by 100% crystal-clear, archival safe polypropylene. These envelopes can also be customized with color printing and private labeling to take your mailing to the next level. Because they’re archival safe, you can also use EnvyPak clear booklet envelopes for organizing and storing important documents at home or work. Certificates, letters, brochures, photographs and small items are protected from moisture and damage.These envelopes can also store coupons, scrapbooking and craft items and papers and lots more.