Survivor‚® 12 x 16 x 4 DuPont Mailers with Redi-Strip‚® Closure - 50 / CT - 12 Width x 16 Length - 4 Gusset - 18 lb - Self-sealing - 50 / Carton - White

Expansion Envelopes with heavyweight Tyvek offer superior protection for mailing bulky items that are not too heavy. They are ideal replacements for costly boxes or cartons. Envelopes feature open-side style and convenient Flap-Stik closure. Envelopes made with DuPont Tyvek won't rip, tear or puncture. They are much stronger and more secure than traditional paper envelopes. These 18 lb. 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 4" to accommodate bulky items
• Self-seal, Redi-Strip closure for a clean, quick seal immediately on contact
• Peel-off strip to protect adhesive from dust for a longer shelf life