Founded by David Weck in 1999, BOSU® makes fitness tools and training programs built around its iconic Balance Trainer, the half-dome platform used to develop balance, core strength and overall fitness. Its USA-made product line has grown beyond that signature trainer, while the company says more than 1.4 million households own a BOSU® product. The name reflects its training philosophy—“both sides utilized”—and its manufacturing aims to reduce toxins and use more sustainable resources.