On average, people spend a third of the day sleeping or at least struggling to sleep. So, if you live to be 85, you will have spent around 28 years sleeping. However, sleep problems are increasingly burdening our “meritocracy”. Noise pollution, apartments that are too cold or too warm, and poor air quality can impair sleep quality. Due to stress and overload, necessary measures are often not implemented. As mentioned in previous articles, the temperature in your bedroom should be 18°C, something that has even become legal and medical consensus. This applies to Switzerland and many European countries, where most people have a bed, blanket and pillow. Many well-insulated apartments tempt you to wear light or no nightwear, even in winter. The latter is generally unhealthy.