Shop Men's at RalphLauren.com, the Official Site of Ralph Lauren. Duck Corduroy Driving Cap - This handsome driving cap is crafted from cotton corduroy and features allover duck embroidery. Sewn bill. Adjustable leather strap with a gold-toned roller buckle at the back. Fully lined with plaid cotton twill. Shell: 99% cotton; 1% elastane. Lining: 100% cotton. Strap: 100% leather. Imported.