Yes! The lights are designed to with a safety measure to shut off when it gets too cold to prevent damage to the electronics, but the actual operating temperature varies based on how active the wearer is (i.e. how much body heat is being generated) and how long the unit is in use out in the cold. So it can operate in extreme temperatures, but the previously mentioned factors will determine just how long. Generally speaking, a normal outdoor routine will be fine, but it probably won’t last all night. We have received positive feedback from some customers in as low as -50°F.