Envelopes are essential for businesses and individuals looking to send letters, documents, or other items through the mail. These protective packaging items are designed to securely hold and transport various types of mail. Envelopes come in a variety of sizes and materials, making them suitable for different mailing needs. They provide privacy and protection for the contents inside, ensuring they are delivered safely and securely. Whether for personal or business use, envelopes are a convenient and practical choice for sending mail.