Axel Voss, German politician
The biologist
Vernon Kellogg in 1922, wearing a single-breasted suit with a double-breasted waistcoat. Note the antique style of shirt collar
A suit is a set of clothing intended to be worn together. It may be a semi-formal 'lounge suit' or 'business suit'. It always includes a jacket and trousers (pants). In classical gentlemen's tailoring, a waistcoat (U.S: vest) is usually worn with single-breasted suits.