For a shave that adapts individually to your facial contours, hair structure, and beard density, the ES-LV97 utilizes smart beard sensor technology. This enhances performance where beard growth is particularly dense and reduces it in other areas to avoid skin irritation, ensure an even shave, and provide up to eight hours of smooth skin. Based on the art of traditional Japanese samurai sword making, Panasonic has developed durable inner blades made from Yasuki Hagane steel, which are honed to just 30 degrees. This means they can capture even dense stubble close to the root, allowing you to remain stubble-free for up to eight hours. They neither dull nor cause skin irritation. With specially designed 5-blade curved blades, you can style all types of facial hair: The Quick-Slit foil is designed to pre-cut longer hairs. The Quick-Lift foil lifts flat-lying hairs, and the Finishing foil provides a second, more precise cut for longer hairs.