📬 Ship Smart, Ship Stylish! Flap-Stik peel and seal closure provides a clean, sanitary seal without moisture. Comes in a box of 25, ideal for both occasional and frequent shippers. Features a 2" expansion for accommodating bulkier items effortlessly. Crafted from DuPont Tyvek, these mailers resist punctures, tears, and moisture. Lightweight design helps reduce postage costs while ensuring safe delivery. Durable Tyvek material 10" x 13" size Self-seal closure Quality Park Survivor Lightweight Tyvek Mailers are designed for durability and efficiency, featuring a 10" x 13" size, self-seal closure, and an expandable design, making them perfect for shipping a variety of items securely and cost-effectively.