Cassocks! Fr. Iggy and the Readers wear cassocks every Sunday, but what is it about these? These are non-liturgical garments that set the clergy (both tonsured and ordained) apart in a very visible way. What you most often see us wearing are called “podriasnik” or “rason,” - inner cassocks, and you’ll see Father wearing an extra one sometimes - the “riassa” or “exo-rason” - the outer cassock with the Harry Potter sleeves.
In our Russian tradition, monastic clergy wear dark colored cassocks with a special belt and buckle; married clergy wear whatever color inner cassock they like, from white to red to green and blue. The inner cassocks are almost always belted, either with a cord, a ribbon, or a decorative tie, but this is largely optional. The outer cassock is still usually black, but the sleeve linings may denote priestly rank, e.g., Fr. Iggy has been awarded the right to wear purple lining in his riassa. This is sort of a neat throwback to the pre-Revolution days, since the modern Russian practice no longer does this, but since ROCOR preserved the earlier practice, we still do.