Tweed sport coats have in the past been associated with academics or old men but today I feel they are ready for their due redemption. Tweed was first produced in Scotland and Ireland and its durable and warm nature makes it ideal for country wear while shooting or hunting. The best tweeds are Harris and Donegal manufactured in Scotland and Ireland respectively. The ability of tweed to add true character to any mans wardrobe makes it invaluable and no man should consider theirs complete until it includes at least one piece of tweed. These days good tweeds can be a little harder to find off the peg, requiring some searching or some tailoring. One British clothier known for their country wear is Cordings. There catalog includes numerous tweeds in addition to other fine items. I personally prefer a tweed jacket with leather buttons as I feel this adds additional character to the jacket.
Best worn during the fall and winter and when paired with cords your tweed will help seal out the biting wind.
Because tweed tends to have a considerable amount of visual texture, consider how busy the other articles of clothing you are wearing are in order to achieve a proper balance.