During the day when the band is only over a bodysuit or on bare skin, please monitor baby at all times. Consider the band like another layer of clothing. Baby can wear the band underneath any outer clothes or Onesie while sleeping. Keep the room temperature cool. Make sure any other clothes are not too thick or warming, like fleece or synthetic fibers, in order to prevent overheating. Always fasten band underneath baby's arms around the belly area and not over. Always follow safe sleeping practices.