Heavy 18 Lb Tyvek Open End Expansion Mailers, First Class, #13 1/2, Square Flap, Redi-strip Closure, 10 X 13, White, 100/ct

Expandable mailer made with DuPont™ Tyvek® material delivers the best possible protection at a shipping-cost-saving weight. Inserting and removing contents is easy because of its horizontal, open side orientation. Self-adhesive Redi-Strip® closure provides a secure, peel-and-press seal. Clean, crisp look makes a professional impression.