JAM Paper #11 Tear-Proof Tyvek Envelopes, 4.5 x 10.375, White, 50/Pack (2131078C)

JAM Paper® White #11 Business Tyvek® Envelopes measure 4 1/2 x 10 3/8 inches each and feature a versatile, plain and bright shade of white. There is an even total of 50 envelopes in this pack. Each one of these envelopes is made out of out of smooth, durable, tear-proof, 10% recycled Tyvek material. Tyvek is a registered trademark of DuPont, the established chemical company responsible for developing this durable polymer. Each one of the high quality envelopes in this pack features a commercial flap style opening and a reliable self-adhesive strip closure to keep the letters and other papers placed within them secure as they are transported through the mail.