Colored envelopes for creative letters. Most people would probably prefer to send a message in a chat rather than write it out and send it by mail. However, sometimes, such as during a power outage, modern technologies and all social networks lose their power. Because the work environment needs something more reliable, old-school letters are fantastic. These Elco envelopes help you deliver colorful messages thanks to their brilliant, rich colors. Unlike traditional white envelopes, these create an immediate and lasting impression, ensuring that your attitude and style will be noticed. They also open up new avenues for correspondence, as you can implement various ideas using brightly colored envelopes. They are produced in Switzerland with high-quality paper weighing 100 g/m² and in C5 format.