The cumberland strip seal expandable envelope is designed for those who need to securely store and transport large volumes of documents. With a robust 150gsm construction, this white envelope measures 245 x 162mm and is perfect for holding confidential documents, catalogues, and more. Its window face and secretive pattern ensure that your contents remain private and protected from prying eyes. Ideal for businesses and individuals who require reliable and secure mailing solutions, this envelope is a must-have for any office or home workspace