# Survivor® 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.

-   Expandable design made with DuPont™ Tyvek® material.
-   Horizontal, open side orientation.
-   Redi-Strip® self-adhesive closure.
-   Clean, crisp look.

## Details

- **Price:** 221.98 USD
- **Vendor:** Survivor®
- **Type:** Catalog Envelopes
- **Tags:** 10 x 13 x 2, Envelope, Envelopes, Expansion, First Class, Heavyweight, Letters, Mailer, Mailrooms, Open Side Envelopes, Packages, Posts, QUALITY PARK, Receiving, Self-Seal, Shipping, Stationery, SURVIVOR, Survivor Envelopes & Mailers, Tyvek, Tyvek Envelope, Tyvek Envelopes & Mailers

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 221.98 USD | In stock |

## Images

- Tyvek Heavyweight Expansion Mailer | 10x13

---

> Source: [Bloom Skins](https://www.bloomskins.com/products/heavy-18-lb-tyvek-open-end-expansion-mailers-first-class-13-1-2-square-flap-redi-strip-closure-10-x-13-white-100-ct)
> Updated: 2026-08-29