A foil shaver is an electric shaver that uses oscillating blades, also known as cutters, beneath a thin layer of metal, called a foil, to cut hair. The foil captures the hair with its holes, cutting it close to the skin and offering a close shave. Foil shavers are designed to make confident, straight strokes, and there is no need to make any circular movements as you would with a rotary shaver. Foil shavers are ideal for trimming thick facial hair quickly and taming long beards. They are also perfect for trimming sideburns and mustaches, as they offer a high level of precision. Foil shavers prevent skin irritation that can be caused by a razor blade, as the foil head will protect your skin from coming in direct contact with the blade. They cut hair at a higher speed, as the foil shaver spins faster than a rotary shaver, with a high vibration rate of up to 14,000 cycles per minute. Foil shavers require a slightly different movement when it comes to shaving compared to rotary electric shavers. To use a foil shaver, you should prepare your skin, draw straight lines with the shaver, and work your way towards less sensitive parts of your face.