Duck® Brand Reusable 2-Way Flexible Mailers are the perfect all-in-one solution for mailing items professionally and affordably. Ideal for clothes and other non-fragile goods, these mailers also feature two, separate seals so that the mailers can be reused for shipping returned items back to the original seller. 2-Way Flexible Mailers are lightweight and the self-seal feature means no need for extra tape or glue. Plus, they are water resistant for spill and weather protection during transit so you can be assured your item will arrive in great condition. Seam Type: Weld; Flap Type: Square; Security Tinted: No; Opening: Open End.