Sabatons are splendid, medieval shoes are acceptable. Sneakers that are all black or brown are acceptable, Hose is good. Sweatpants and, if visible, socks of a matching color, are acceptable. There are hardly any cases where armor covers enough of jeans to make them acceptable. For safety reasons, mitten gauntlets and basket hilts are acceptable.
Barred visors are acceptable on great bascinets.
We'll tend to be more forgiving if you need to wear glasses that fog up in closed helmets.