Our envelopes are designed to solve the problem of fragile, easily damaged mail. Perfect for important documents, these envelopes are strong, durable, and more eco-friendly.✔ 14 lb. stock, water and moisture-resistant, tear and puncture-resistant✔ 100% recyclable, made from an average of 10% post-industrial content✔ Size: 10" x 13", catalog style✔ Zip Stick® for easy self-sealExperience the smooth, resilient texture of Tyvek®, ensuring your mail arrives in pristine condition. Customize your envelopes today with our advanced tools and enjoy fast turnaround.