Pack of 25 80gsm White Paper Window Self-adhesive Mailing Envelopes 11 x 22cm. The Pack of 25 White Paper Window Mailing Envelopes is made from highquality 80gsm paper, offering durability, a clean professional appearance, and secure protection for your documents. Each envelope features a transparent address window for quick identification and a strong Peel & Seal adhesive strip that allows fast, messfree sealingsimply remove the protective paper and press to close. The adhesive maintains longlasting stickiness to ensure safe mailing and storage. For users who prefer traditional sealing, the slobberglue option remains effective for at least five years and activates easily with a small amount of water. Ideal for express services, mailing tasks, packaging, and sending small replacement parts, these envelopes provide a practical and efficient solution for both personal and business use. Compact, reliable, and easy to handle, they are perfect for everyday office mailing needs.