SISU is a brand who have built a brilliant business around one simple guarantee: More protection, less mouthguard. The company was started in the USA, based in Saline, MI, with the founders originating in Sweden. The company were named one of the fastest growing companies in the United States by Inc. Magazine in 2016, which isn’t surprising considering the sheer amount of research and originality in their mouth guards, as these are vastly different from anything else on the market.
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