Onassis currently has one style of sport coat, the Two-Button Cavalry Twill Blazer, that comes in a faded orange and a warm grey. These cool, unlined blazers have great double-pocket detailing and manage to look the most fashionable and the most laid-back of this bunch. Lovers of Engineered Garments and Junya Watanabe will appreciate the workwear-influenced style at a lower price-point. [$248; onassisclothing.com]