1) Made from premium fabric. the highest quality 12oz duck canvas. It's designed to have an amazing soft feel but withstand the toughest wear. 2) Backed by a 25 year guarantee. 3) Made in America. The Quarter Century Jacket is made from premium US made 12oz duck canvas. Duck canvas differs from plain canvas in that the threads in the former are stronger and more tightly woven. The jacket is then constructed right here in America and finished with military grade hardware. The result: the best fitting, most durable jacket on the planet.