Quality Park Tyvek Expansion 10in x 14-1/2in x 2in Envelopes, 18 Lb, Self-Adhesive Closure, White, Carton Of 100

Made of water- and tear-resistant material for added protection Release strip is easily accessible, yet maintains security of contents. Flap-Stik closure requires no moisture to seal. Keeps your mail protected against bad weather, spills and rough handling.