# Survivor® Heavyweight 18lb Tyvek Open End Expansion Mailers, #15 1/2, Cheese Blade Flap, Redi-Strip Closure, 12 x 16, White, 100/Carton

Envelopes expand to provide lightweight, inexpensive shipping for bulky items. Expandable envelopes are made of puncture, tear and moisture-resistant DuPont™ Tyvek® material. Envelopes made with Tyvek® are half the weight of heavy duty paper envelopes, so you save on postage with each mailing.

-   Expandable fit made of rip and water resistant Tyvek material with self seal flap.
-   Strong, lightweight envelopes made of Tyvek® material are half the weight of heavy-duty paper envelopes; save on postage with every mailing.
-   Envelopes made with Tyvek® repel water and resist acids, bases, salts, rot, mildew and stains; perfect for storing taxes and essential papers in the home office.
-   Redi-Strip ® envelopes seal tight to keep contents safe€”just pull and press€”adheres without moisture for a clean, instant seal.
-   Ideal shipping envelopes for clothing, books, binders and big bulky papers.

## Details

- **Price:** 271.79 USD
- **Vendor:** Survivor®
- **Type:** Catalog Envelopes
- **Tags:** 12 x 16 x 2, Envelope, Envelopes, Expansion, Heavyweight, Letters, Mailrooms, Open End Envelopes, Packages, Posts, QUALITY PARK, Receiving, Shipping, Stationery, SURVIVOR, Survivor Envelopes & Mailers, Tyvek, Tyvek Envelope, Tyvek Envelopes & Mailers

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 271.79 USD | In stock |

## Images

- Survivor Heavyweight Tyvek Expansion Mailers

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> Source: [Bloom Skins](https://www.bloomskins.com/products/survivor®-heavyweight-18lb-tyvek-open-end-expansion-mailers-15-1-2-cheese-blade-flap-redi-strip-closure-12-x-16-white-100-carton)
> Updated: 2026-08-29