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Originally Posted by notoriousshep
so wats the deal with theese do they work , could it really add two or three inches on the vert leap
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There is really no answer I can give you but I can tell you that it works like a spring. So, the more force you can apply toward the ground the more of a gain you'll get.
so basically the stronger you are, the more of a gain you'll get from the springbak soles. But i heard that they are comfortable so I guess they are worth getting.