Upgrade your mailing with the Indigo® C4 White Peel & Seal Envelopes. Designed to accommodate A4 documents without folding, these premium envelopes provide a professional and dependable solution for business, school, and personal correspondence. Manufactured from high-quality 100gsm paper, they offer excellent durability, opacity, and a crisp white finish. The peel & seal closure provides fast, secure, tamper-resistant sealing without the need for moisture, making everyday mailing quick and efficient. Perfect for letters, invoices, contracts, reports, and other important documents.