Smirnoff was the first company to use charcoal as a filter for vodka. Smirnoff Vodka is distilled from corn, making it gluten-free.
Smirnoff is a clear, grain-based vodka, which is the most popular and tends to be smooth and fruity. Grain-based vodkas generally do not require as much distillation as vegetable-based vodkas, as grain produces less impurities during the fermentation process. Smirnoff Vodka has been distilled 3 times. Generally, repeated distillation will produce a purer spirit that is smoother on the palate.