Suma Mirrors go through proprietary SOGEL process that takes multiple steps/days to produce our signature, blue mirrors such that the mirrors themselves are actually clear and colorless.
The reason Suma Mirrors look blue is because it absorbs all spectrum of the colors except the blue color that's pleasant to the eyes, effectively reducing glare (the yellow color spectrum, which causes the glare, is absorbed).
Other mirrors, in contrast, use the vacuum coating process such that the blue color is actually coated on the mirror itself (unlike ours, clear/colorless mirrors that only reflect blue color). Based on that, they are not truly anti-glare because the glare is still reflected to human eyes. Over time, the blue coating will eventually fade. The blue hue of Suma Mirrors do no fade and are truly anti-glare.