Survivor® 10 x 13 DuPont Tyvek Tamper Indicating Panel Catalog Mailers

Security - 10" Width x 13" Length - 14 lb - Peel & Seal - White - Tyvek - 100 / Box. Made with durable yet lightweight, 14 lb. DuPont Tyvek that's tough enough to resist punctures, tears and moisture during shipping. Unique, tamper-indicating panel on flap displays "opened" in red if the seal is broken.