Peel & Seal window envelopes are designed with a convenient peel strip for a quick and super secure seal across each envelope's width that won't easily open or tear. The window allows for a clear view of the recipients address and no need for further printing or handwriting. These envelopes are designed with a premium blue tint security design to protect contents and sensitive information, perfect for secure business mailings. These envelopes can be custom printed so that company information is displayed right on the envelope.