Nike Therma Sphere Men's Therma-FIT Fitness Pants WARM COVERAGE FOR COOL-WEATHER CONDITIONING. Shrug off the chill before and after training or competing on cooler days in the Nike Therma Sphere Pants. Soft layered knit fabric teams up with built-in breathability to keep you warm without overheating. This product is made with at least 75% recycled polyester fibers. Soft Feel Layered knit fabric feels soft and comfortable. Lasting Warmth Nike Therma-FIT technology helps manage your body’s natural heat to help keep you warm in cold-weather conditions. Built-in Breathability The hems unzip so you can adjust your airflow down low. The breathable inset at the upper back releases excess heat to help prevent you from overheating. More Details Standard fit for a relaxed, easy feel Body: 100% polyester. Panel: 90% polyester/10% spandex. Machine wash Imported Elastic waist with drawcord Zippered pockets on sides 100% POLYESTER