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Epiphany is a Russian holiday where people purify themselves by taking a plunge into ice-cold water.
The low temperatures might deter some potential participants, but some strong-willed women have made the bold decision to brave the cold in their bikinis.
Acid Cow has compiled a series of photos showing several individuals who laughed in the face of hypothermia as they celebrated Epiphany.
Have a look at them in the gallery above.