Originally Posted by Hayward
Quite, but I feel that using a tailored garment as a basis for something that is to be worn while traveling is a bad idea.
A travel coat needs to either resist wrinkling or be designed in such a way that wrinkles do not deter from its appearance. It needs pockets in places which are not optimal for a tailored coat due to bulk; it needs to be durable and should also provide protection against the elements if necessary. All of these features would detract from the appearance of a tailored coat when used for the occasions it would be called for once you are at your destination. A tailored suit or sport coat is easier to pack, if done carefully, than outerwear, and takes up less space in luggage. The travel coat can be used as outerwear or as a casual day coat, while making room in your bag for the dress jacket.
I've seen a Fay travel blazer exactly in this mould recently. Basically a blazer made out of a waterproof fabric, with extra pockets - quite nice.