Tyvek® JUMBO ENVELOPES Open End, Zip Stick - Plain 250/Carton Flaps Folded Tyvek SUB 18Super Large Tyvek Mailers are great for shipping and storing large items needing superior protection. Sub 18 Dupont™ Tyvek® material will protect the contents from the elements. Other uses include protecting and transporting blueprints, artwork, drawings, glass, and other large material that needs to be stored flat. They also have a very easy to use peel and seal closure.Tyvek Envelope / Bag SpecificationsClosure: Self Seal Zip Stick adhesiveType: Open End Catalog envelopePackaging: 250 envelopes per cartonProduct name: Jumbo Tyvek EnvelopesRecycled: 10% post-industrial contentRecyclable: Yes 100%Material: Dupont™ Tyvek®Features: Opening on the 13" end, Durable Tyvek, Peel Seal Closure, LightweightNot sure? Ask for a free Tyvek envelope sample today.Check out my other items!