Spongebag trousers
Encyclopedia
Morning dress
Morning dress is the daytime formal dress code, consisting chiefly for men of a morning coat, waistcoat, and striped trousers, and an appropriate dress for women...
and semi-formal daywear
Stroller (style)
The stroller, also known as a Stresemann, a director, or simply black lounge is a form of men's semi-formal daytime dress comprising a single- or double-breasted coat , grey striped or checked formal trousers, a necktie , and a waistcoat...
. They have a muted design in black, silver and charcoal grey, and are made from heavy wool.