What is red shirt suit?

As an AI language model, I don't have specific information about a red shirt suit. However, I can provide general information about red suits and suits with red shirts.

A red suit is a bold fashion statement and typically not suitable for formal business attire. It can be appropriate for social events, weddings, or parties. Red suits are available in various shades of red, from bright to dark tones.

A suit with a red shirt can look stylish and trendy if balanced with neutral or complementary colors such as black, white, or gray. However, it's essential to ensure it's not too overtly conspicuous and loud for the occasion. The selection of a tie, belt, and shoes should be done carefully to match the colors of the suit and shirt.