Back protector Amplifi Fuse Jacket Certified back protector in the form of a vest. The Fuse Jacket consists of two honeycomb layers that are lightweight, have excellent air circulation and shock absorption while keeping the rider unlimited. Underneath, there is a breathable, reticulated fabric that protects against overheating, while at the same time bracing and shock absorbing. Protector contains high quality YKK zippers, flat