For cold weather runs, the Mizuno Breath Thermo Tight is essential. Mizuno designed the Breath Thermo Tight from soft and stretchy fabric to hug your body and maintain your maximum range of motion. The thermal fabric keeps you warm by using escaping water vapor from your skin to generate heat, making it suitable for the colder runs. With reflective details and flatlock seams, the Mizuno Breath Thermo Tight is the ideal cold-weather workout partner.