Nike Therma-Sphere Max Men's Training Pants, Black, Large Face of body: Therma-FIT 88% polyester/12% spandex. Back of body: Therma-FIT 100% polyester. Inseam panels: Therma-FIT 87% polyester/13% spandex. Pocket bags: Therma-FIT 89% polyester/11% spandex. Imported Zip hems for adjustable fit and easy on and off Zip pockets for secure storage Elastic waist with drawcord for adjustable fit A durable, water-repellent finish helps keep you dry in rapidly changing conditions without sacrificing breathability Zoned Nike Therma-Sphere Max technology uses a 3-D structure to trap warm air close to your body while wicking sweat away