The Idena envelopes in DIN long format are the perfect choice for the professional mailing of letters and documents. The set includes 25 envelopes made from high-quality, recycled paper with a weight of 75 g/m². The gray envelopes give your correspondence a modern and appealing look. Thanks to the practical window, you can conveniently display the recipient's address on the enclosed letter without needing additional address labels. This saves time and ensures a clean appearance. The self-adhesive flap allows for easy and secure sealing of the envelopes without the need for additional tools like glue or moisture. This saves you time and effort when sending your letters. A special feature of the Idena envelopes is the security slits, which ensure that the envelope is not damaged when opened and that your documents are securely protected. You can send confidential information and important documents with confidence. The envelopes are certified with the renowned Blue Angel, an environmental label that meets high standards for eco-friendliness and sustainability. With Idena envelopes, you choose an environmentally conscious option for your office communication.