Yes, you can even wear it while you sleep, and we encourage you to do so. In fact, the EMF pendant and the necklace chain have been energized with our proprietary technology for EMF protection whenever it's on your body. The bioenergetic frequencies that they contain are supporting your overall health and wellness to improve physical wellness and support healthy physiological functioning. The pendant is not an electronic device and the energy contained within has been engineered to neutralize harmful EMF emissions around you.