Advanced Hydrating Gel Reservoir The water activated gel hydrates the skin throughout each shave and lasts up to twice as long as ordinary lubricating strips. 5 UltraGlide Blades with Skin Guards Protecting Skin Guards act to smooth the skin's surface, preventing it from getting caught between the blades which helps to reduce irritation. Flip Trimmer Flip back the hydrating gel reservoir to use the top of the blade head to edge and trim those hard-to-reach areas such as under the nose.