The Hellcat Fuse is ready to withstand your longest days, by fighting back with two of Wolverine�s most recognizable comfort technologies. The boot�s Wolverine DuraShocks technology features two pads at key strike points in the outsole that are specifically tuned to compress under impact and absorb shock and is powered by a high-performance UltraSpring midsole that delivers a lightweight, supercharged ride for maximum response. Merged, these technologies provide unparalleled energy return, keeping your feet cushioned while also making sure that every step taken is not wasting energy.