Deep Red in cold, Red in hot - Experience the fun color-changing nail polish in Hot & Cold A unique range of newly formulated nail polish that change colors in Hot @ Cold. With beautiful color combinations for you to choose from, for different occasions.- Easy-glide brush tip- Quick, even applicationDirections: Apply a coat of your favorite Thermo nail polish color neatly, and let it dry. Apply the second coat for a professional finish and perfect color.