One of the oldest baits around doesn't look like much but when fished correctly can be a smallmouth killer even under the toughest of conditions...
Take a simple jighead typically ranging in size from 1/16 to 1/4 oz, tie on some animal or synthetic fur, adorn it with a trailer at times and out pops a piece of smallmouth candy, a simple hair jig...
Take a moment and watch the following video from the folks at InFisherman and see what I mean...