Easy Rider: Seersucker light blue blazer by CANALI ($995). Blue linen trousers by INCOTEX ($275). Both available at Saks Fifth Avenue, 5300 Wisconsin Avenue NW, 202-363-2059 and Tysons Galleria, 2051 International Drive, McLean, Va., 703-761-0700. Blue striped dress shirt with contrast collar ($145), brown leather belt ($85). Both by POLO BY RALPH LAUREN. Ralph Lauren, the Collection at Chevy Chase, 1245 Wisconsin Avenue, Chevy Chase, Maryland, 202-965-0905.