Ice swimming is a traditional ritual that forms a part of Finland’s rich sauna heritage. It is enjoyed by a large body of supporters who claim that ice swimming provides relief from many ailments. Practitioners say it boosts the flow of blood and mitigates back, neck and shoulder pains. When a hole in the lake or sea ice is not available, some Finns will seek relief from the heat of the sauna by diving into piles of snow as a substitute for ice swimming.