They're made so that you don't get thrown into the floorpans of your car should you crash, and designed, along with the rest of the truck's cab, to let you move just enough to stay restrained but seated in the case of a roll where your roof collapsed. The speeds and forces acting on your body during even a "minor" impact are rediculous, and you shouldd definately do your share of research before spending money on a seat.
As with everything else, avoid knock-offs, too.
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-Taylor
DenOfDebauchery
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