I open the filing cabinet and take out two files and a manila envelope that has the information I need in them. A "manila envelope" is a large, yellow-colored envelope (notice we can say "envelope" or "envelope") made from thick paper. In the United States, most envelopes are small and white. We use these to send letters, usually. But larger envelopes are often manila envelopes that are yellow. These envelopes are usually the size of a piece of paper and let you send things in one package without folding them. For the report, the information I need is inside two files and in a manila envelope.