Can you use FIR amethyst mats at night on a bed and how comfortable are they?

You can use the mat at night for up to 12 hours. We recommend setting it to a comfortable, slightly warm temperature on the lowest levels (Levels 1–2 out of 7, or up to about 50°C / 130°F). Never use a temperature that feels too hot.

The mat is comfortable for resting or sleeping, but it is important to remember that it is not the same as a spring or foam mattress. The surface is flexible, but it is made of hard stones. Most people enjoy lying on the mat, but it should not be expected to feel as soft as a traditional mattress. It offers a different type of comfort.