Sometimes a technology can work too well. Take, for example, our proprietary Fusion Fleece, a key component in our Impact Hunting Jacket. By adding multiple density fabrics into each of the jacket panels, we were able to squeeze far more BTU's from our Impact Jacket than any other product on the market. The problem was it was just too warm for many situations. As is so often the case, the simplest solution was the best... we cut the sleeves off, and the Kinetic Hunting Vest was born. Brilliant!