Sauna sand glasses are the traditional sand glasses that are produced for saunas and steam rooms and are resistant to high temperature and humidity. Their aesthetic and ancient look are in fact functional. They show you the time in a simple and efficient way instead of the sand glasses that will rust and become moldy under high temperature and humidity. Sand amount is paralel with the real time intervals. They are used by switching. When the sand flow is over, that means you have spent enough time in the sauna and you have to leave. Poolline sand glasses are very useful sauna equipments that are produced from wood, glass and sand.