Mizuno Breath Thermo Women's Layered Running Tights Twin-Layered Breath Thermo Fabric Structure - Incredibly lightweight and resilient fabric employed across the front-thigh and back-cuff to convert moisture into heat. Dynamotion Fit - Enhanced cut provides an optimal fit that moves with the body. Breath Thermo Yarn - Captures escaping body heat and - through a patented physical reaction in the yarn - generates heat. BlindStitch - Anti-abrasion seams deliver enhanced comfort and a more robust product. Reflective Logo and Accents - Positioned on the front and back, ensuring you remain visible in low light conditions.