Men's Hawes & Curtis Curtis Formal Popl - Blue - Formal shirts This stylish men's blue poplin shirt features double cuffs and a full cutaway collar, also known as the Windsor Collar. The Windsor collar was specifically designed by Hawes & Curtis to accommodate the Duke of Windsor's ties. This shirt is made from the finest 2 ply 100s cotton which has been perfected with our unique silk touch finish. The slim fit is gently tapered at the waist for a relaxed, contemporary silhouette. 2 ply 100s Cotton. Slim Fit. Double Cuff.