Tyvek® / FLAT ENVELOPES / Open End, Green First Class Border, Zip Stick / 500/Carton Flaps Folded / Tyvek SUB 14Bulk Tyvek Envelopes come with an easy to use Zip Stick closure. Moisture notneeded to close the flap. Thisenvelope is 10 times stronger than a normal paper envelope. The spun-bound olefin material weighs about half commercial paper stock. Besides saving postage, you can fit more inside each envelope. No need to worry about bursting or tearing through the mail stream. When customers receive mail in a Tyvek envelope they know the contents are special. Answers to often asked questions.....Open End: Designates the opening to be on the short dimension of the envelope.SUB 14: Refers the substrate weight.Zip Stick Closure: Peel away strip with contact adhesive glue for sealing the flap.Tyvek: Spun Bonded Olefin Material made by DuPont. It comes in 11#, 14#, and 18#Tyvek Envelope SpecificationsSize: 10 X 13Weight: 14#Packaging: 500 envelopes per cartonPrice: $186.14 (500)Color: Bright White with green first class border.Closure: Peel & Seal Zip stick adhesiveStyle: Catalog (open-end)Additional Service: Custom print your envelope order with up to 4 PMS colors. Ask for details and pricing.Discount: Multiple carton discounts. Make an offer now!Shipping: free fedex ground to continental United States.Need a different size or substrate? Click theredstores button >Not sure? Ask for a free Tyvek Envelope sample today.Marketing idea: Have the Envelope Spot print your company logo, website url, and QR code on the outside of your envelopes.