Deluxe Tyvek Expansion Envelopes, Open-End, 1.5" Capacity, #13 1/2, Square Flap, Self-Adhesive Closure, 10 x 13, White,100/BX

Ideal for mailing bulky items and materials. Excellent alternative to heavy boxes and cartons. Superior water-, chemical-, moisture-, burst-, tear- and puncture-resistant protection.