Color-changing manicures are here! Nails Inc recently released its $15 Are You Hot or Not? nail polish duo, making a color-changing manicure possible at home. The nail polishes are heat-reactive, so they change color when exposed to heat. The shade You're Hot Then You're Cold goes from dark gray to a pinky nude, and the shade Hotter Than Hot goes from light pink to white.br br Products used in this video:br Nails Inc Are You Hot or Not? Nail Polish Duobr br This video is not sponsored. The above link is an affiliate link, meaning Insider may receive a portion of any sales.