Lightweight Tyvek Envelopes 9x12 Lot of 20

Lightweight Tyvek-like Envelopes Shipping Mailers 9x12 Lot of 20 Envelopes feature lightweight weight polyester plastic for secure mailings. Made of moisture-resistant and tear-resistant material. Self adhesive, peel and seal open end. These will ship folded. Choose one of the 3 sizes listed above and quantity. Tyvek-like material Poly material