Since Buick sponsors golfing events (the Buick Open, Buick Invitational, etc.), there were promotional golf jackets, windbreakers, coats, etc., available at these events.
Here’s a look at some of the Buick clothing that could be had.
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Here’s some other items if you’re shopping for Buick merch:
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Here's some related Buick items if you happen to be shopping for Buick merchandise! (if you can't see them, turn off your ad blocker!)
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