During red light therapy (RLT) sessions, it’s generally recommended to expose the skin area you wish to treat directly to the light, which usually means removing clothing from that specific part of the body. While some light will make it through thin clothing, direct exposure ensures that the therapeutic light wavelengths penetrate the skin and underlying tissues effectively, maximizing the treatment's benefits. For example, if you're using our Ironforge or Lux Vital device for joint pain in your knee, you would ideally have the knee area uncovered during the therapy session.