Survivor R1470 Tyvek USPS First Class Mailer Box of 100 and R4510 Tyvek Expansion Mailer Case of 100

This product bundle includes 100 Survivor R1470 Tyvek 9 x 12 inch first class mailers along with a case of 100 Quality Park Survivor R4510 Tyvek expansion mailers. The Survivor R1470 mailers are made of 14 lb DuPont Tyvek material while the R4510 mailers use 18 lb Tyvek. Both mailer types utilize the waterproof, tear-resistant, and puncture-resistant properties of Tyvek to protect package contents during shipping. The R1470 mailers feature a 9 x 12 inch size for smaller items, while the R4510 expansion mailers can expand up to 1.5 inches to accommodate bulkier contents. Each mailer style provides a Redi-Strip closure for a tight, moisture-free seal and easy opening with the included release strip. Using Tyvek mailers can ensure shipped items arrive safely at their destination while also reducing postal expenses due to the lightweight construction. With this bundle, you receive mailers in two versatile sizes to ship a wide variety of personal and business items efficiently and securely.