Brown Rigid Mailers, Stay Flat Cardboard Envelopes, 10 Count, 13 x 18 in

Ensure your valuable documents and artwork arrive in pristine, unbent condition with these heavy-duty 13 x 18 inch rigid mailers designed for ultimate transit protection.

Shipping large, flat items requires a specialized solution that prevents folding and creasing during the rigorous delivery process. These 13 x 18 inch cardboard mailers are constructed from premium 550 GSM kraft brown paperboard, providing a high-density shield that maintains its shape even under pressure. Whether you are an artist sending out limited edition prints, a photographer delivering professional portraits, or a business professional mailing sensitive legal documents, these stay-flat envelopes offer the professional security your brand demands. The rigid construction eliminates the need for additional stiffeners, reducing your overall shipping weight and costs without compromising on safety. Each mailer features a convenient self-seal adhesive strip that creates a tamper-evident bond, ensuring your contents stay secure from departure to arrival. The integrated tear strip closure allows your customers to open their packages easily without needing scissors or knives, which could accidentally damage the items inside. This 10-pack set is an essential logistics tool for e-commerce sellers, hobbyists, and offices looking for a dependable, eco-friendly mailing solution that prioritizes the integrity of every shipment. - Heavy-Duty 550 GSM Construction: Provides a thick, rigid barrier that prevents bending and crushing to keep your photos and documents perfectly flat.
- Secure Self-Seal Adhesive: Features a strong peel-and-press strip that creates a permanent seal, saving you time on packaging and ensuring contents remain immobilized.
- Integrated Tear Strip Opening: Offers a frustration-free experience for recipients, allowing them to open the mailer quickly and safely without risk to the internal contents.
- Large 13 x 18 Inch Dimensions: Sized perfectly for oversized prints, certificates, and marketing materials that require professional-grade protection.
- Sustainable Kraft Material: Made from recyclable brown cardboard, providing an environmentally conscious shipping option for modern businesses and individuals.