Protect your important documents with our Do Not Bend hard-backed envelopes, designed for ultimate durability and security. Made from 120 gsm paper and reinforced with a 600 gsm rigid carton, these envelopes ensure that your photos, certificates, artwork, and other valuable items stay flat, crease-free, and damage-free during transit. Featuring a strong, bend-resistant backing, they provide superior protection for both personal and business use. Perfect for secure mailing, these high-quality rigid envelopes guarantee your contents arrive in pristine condition.