This mirror works fine if one shaves in the shower, but to prevent it form fogging, one needs to run hot water over it (front and back) for a while to heat it up. Then, one's shaving with a mirror with water on the front, which is not ideal, but is acceptable. All in all, this is fine in the shower, but isn't magically fog free. It takes longer to warm up (20 seconds, maybe?) than you'd expect.