Our envelopes offer a dependable design for secure mailing. Designed to withstand harsh conditions, these envelopes are perfect for important documents that need extra protection. ✔ 14 lb. stock✔ Size: 10" x 13", catalog style✔ Water, moisture, 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® material. Customize your envelopes with advanced tools and benefit from fast turnaround times. Perfect for legal documents, contracts, and sensitive materials.