Self-adhesive window envelopes feature a clear window that allows handlers to read address info printed on envelope contents. They also feature an adhesive closure with a peel-away protective strip that eliminates the need to moisten flaps. The adhesive helps provide a clean seal immediately upon contact. The peel-off strip protects the adhesive from dust and moisture for a longer shelf life. They can save time in high-volume business mailings by eliminating the need to address envelopes and contents separately.

Gummed-flap window envelopes reveal address info printed on envelope contents and seal closed with moisture-activated adhesive for security during transport. The transparent, poly windows eliminate the need for addressing envelopes and contents separately.