Survivor‚® 10 x 13 x 1-1/2 DuPont Expansion Border Mailers - 100 / CT - 10 Width x 13 Length - 1 1/2 Gusset - 18 lb - Self-sealing - 100 / Carton - White

First-class Expansion Envelopes with heavyweight Tyvek offer superior protection for mailing bulky items which are not too heavy. Ideal replacement for costly box or carton, envelopes feature open-end style and convenient Flap-Stik closure. Being much stronger and more secure than traditional paper envelopes, these envelopes with DuPont Tyvek won't rip, tear or puncture. First-class expansion envelopes are water-resistant and moisture-resistant. They are easy to use. Simply peel and seal.

• Made with durable yet lightweight, 18 lb. DuPont Tyvek that's tough enough to resist punctures, tears, moisture and chemicals for long-lasting performance
• Gusseted sides that expand up to 1-1/2" to accommodate bulky items
• First-class border to communicate importance to recipient
• Self-seal, Redi-Strip closure for a clean, quick seal immediately on contact