Soft Nylon Refill Brush heads to replenish your stock. 2g. Soft nylon bristles. Made in USA. These soft nylon bristles reduce ingrown hairs and razor bumps for a smooth, comfortable shave. Anyone who wants to refill their powerbrush. Before shaving: Moisten face and brush with water, then massage Pre-Shave Gel onto the area to be shaved. Turn on device, choose speed and gently move over face/facial hair for 60 seconds, avoiding eye contact. Follow with shaving routine. For cleansing: Moisten face and brush with water, then massage cleanser onto face. Turn on device, choose speed and gently move the brush over face, avoiding eye contact. Thoroughly rinse face, beard and brush head.