Durable Filson luggage is built to withstand continual use under the most arduous conditions. Filson Rugged Twill is an industrial weight 22-oz. cotton fabric, densely woven for superior strength and long lasting toughness. Before assembly, the fabric is soaked in their special paraffin-based wax, making it highly water repellent and wear-resistant. The fittings and trim are just as tough: brass zippers, clasps and buckles that resist corrosion; Bridle Leather, made from the strongest part of the hide, is vegetable-tanned for superior quality. Meticulously made in Filson's factory in Seattle, Washington....this stuff only gets better with age!