Duster Wool Felt Classic Derby Bowler Hat with Feather Wool Felt Stiff and durable felt construction Genuine feather accent Water repellent Classic Derby style Our hats are custom made to your size to ensure the best fit. Free 60 day hassle-free size exchange. Ultrafino is a registered trademark. Any form of abuse, trademark infringements is serious business and will result in the punishment of Amazon team and U.S. Trademark law.