the perception of heat. Once the Aufguss session has started it is not considered good manners to enter the sauna, as opening the door would cause loss of heat (Sauna guests are expected to enter the sauna just in time before the Aufguss. Leaving the session is allowed, but grudgingly tolerated). Aufguss sessions are usually announced by a schedule on the sauna door. An Aufguss session in progress might be indicated by a light or sign hung above the sauna entrance. Cold showers or baths shortly after a sauna, as well as exposure to fresh air in a special balcony, garden or open-air room (Frischluftraum) are considered a must. In German-speaking Switzerland, customs are generally the same as in Germany and Austria, although you tend to see more families (parents with their children) and young people. Also in respect to socialising in the sauna the Swiss tend more to be like the Finns, Scandinavians or Russians. Also in German-speaking countries, there are many facilities for washing after using the sauna, with 'dunking pools' (pools of very cold water in which a person dips themselves after using the sauna) or showers. In some saunas and steam rooms, scented salts are given out which can be rubbed into the skin for extra aroma and cleaning effects. Hungary Hungarians see the sauna as part of wider spa culture. Mixed genders use the sauna together and wear swimsuits. Single-sex saunas are rare, as well as those which tolerate nudity. Some Hungarian saunas have so-called "snow rooms" that look like little cages with snow and icicles, where visitors can cool down for a couple of minutes after each sauna session. Czech Republic and Slovakia In the Czech Republic and Slovakia, saunas have a long tradition and are often found as part of recreational facilities, as well as public swimming pools. Many people are regular goers, while many never go. Saunas became more popular after about the year 2000, when large aquaparks and wellness centers began to include them. Nudity is increasingly tolerated, and many places prohibit the use of swimsuits; however, most people cover themselves with a towel. Showers are typically semi-private. Having men and women only days was the norm in the past, but today, men-only facilities are rare, while women-only hours are sometimes provided. Norway and Sweden In Norway and Sweden saunas are found in many places, and are known as 'badstu' or