Our envelopes are designed to solve the problem of fragile, easily damaged mail. Ideal for important documents, these envelopes are built to withstand rough handling and harsh conditions.✔ 14 lb. stock✔ Size: 6" x 9", catalog style✔ Water and moisture-resistant, tear and puncture-resistant✔ Eco-friendlier, 100% recyclable, made from 10% post-industrial content✔ Zip Stick® for easy self-sealExperience the durability and reliability of Tyvek® envelopes. Customize your order today with our advanced tools and benefit from fast turnaround times. Perfect for businesses needing secure, professional mailing solutions.