Plastic Security Envelopes for Mailing and Security

Super tough, super strong envelopes for business. Muscle-Pak Mailers.

Light Weight-Waterproof-Tamper Resistant Plastic Envelopes

plastic shipping envelopes
These heavy duty mailing/shipping envelopes are waterproof, tamper and tear-resistant, come in a variety of sizes and can be custom printed with your logo, branding and Business Reply Mail needs.

These versatile envelopes offer a combination of light weight and high capacity. Heavy books, catalogs or promotional material travel through the rigors of the postal service, UPS, or Fedex. Tough, USA made 2.75mil plastic envelopes are built with strong adhesive strip. Simply peel off the paper backing and seal.

Shipping Envelopes for Apparel-Clothing-Textiles

No need to spend extra money for boxes. Our plastic mailing and shipping envelopes come in a wide variety of sizes from 6″ x 9″ all the way up to 30″ x 30″ to accommodate everything from a scarf to a T-shirt, to a pillow, a stuffed animal or even a set of sheets!

Custom Printed Plastic Security Envelopes

Send out a lot of catalogs, merchandise, or samples? For just a couple extra pennies, elevate your image and your brand with custom printed envelopes. Your logo and return address can be pre-printed and your envelopes. Do you offer mail-order returns? Ship a pre-printed return bag with your order. YES!…we can even print your Business Reply Mail details on Muscle-Pak Mailers. For ecommerce businesses and mail order houses, these tough, light weight envelopes are a must. Save time, save money, enhance your image and your brand.

6-color custom printing is available and you’ll be pleasantly surprised by our reasonable prices.

Visit our online catalog to see all our in-stock options or feel free to call for special quotes for custom sizes or printing: 1-800-343-0780