👉 A sauna is a type of indoor heating system that uses heat to warm and humidify air. It typically consists of a heated surface, such as a concrete or metal slab, covered with a layer of water or steam. The purpose of a sauna is to provide a comfortable, relaxing environment for individuals who wish to relax, unwind, or escape from the stresses of daily life. Sassans can be used for various purposes including relaxation, detoxification (to remove toxins and impurities), body heat