Infrared comes in 3 distinct types and because it’s on a spectrum, infrared has a range of waves in its own category. There are 3 types based on wave size, frequency, and the amount of energy they carry: near (NIR), mid (MIR) and far (FIR). Though tiny pinpoint-size waves, each infrared ray does something beautifully unique for our bodies, and nature. Memory tip: each one is named for how close it is to visible light! | Sunlighten Saunas