These simple yet effective white board-backed envelopes afford your documents the best protection during postage. The strong 650 gsm board back keeps your documents flat & offers excellent protection against creasing & tearing. Each board-backed envelope is printed with the words "PLEASE DO NOT BEND", to inform recipients of the nature of the contents. The white paper front is manufactured from 100 gsm paper. This printed board-backed envelope is ideal for everything flat you need to post that needs to remain uncreased. Use this product for documents, cards, files, certificates, magazines & much more. The white paper creates an attractive finish to this board-backed envelope & maes it ideal for when appearance of your goods is important. Each board-backed envelope has a self-seal adhesive strip for quick, efficent & secure closure. Sold in packs of board-backed envelopes