I have been viewing several pre-World War II and wartime British motion pictures that were consistent with their period of creation. Knickerbocker pants are worn by a surprisingly large number of men. While most instances occur among those pursuing sport, some urban men who are not at work are wearing this pant style, best known in the United States as what professional baseball players wear during the contests. Is this pant style only a fashion statement? If it has a purpose beyond fashion, please describe what this purpose is.