Top hat top hat is a hard, black silk hat, with fur now often used. The acceptable colors of hats are much as they have traditionally been, with "white" hats (which are actually grey), a daytime racing color, worn at the less formal occasions demanding a top hat, such as Royal Ascot, or with a morning suit. In the U.S. top hats are worn widely in coaching, a driven horse discipline as well as for formal riding to hounds. The collapsible silk opera hat, or "crush hat", is still worn on occasions, and black in color if worn with evening wear as
Top Hat (company) they witnessed while studying at the University of Waterloo. Early on, the company’s sales approach involved selling directly to academic administration "who had little incentive or interest in changing the way students access course materials," according to Silagadze. The firm changed its tactics to sell directly to educators, a strategy that,according to the company, has resulted in more than two million student subscribers across North America and beyond. The company claims that they are used in over 1000 universities. , Top Hat charges no platform fees for students when their professors assign Open Educational Resources. In 2017, Top Hat was