Nike Dri-FIT Element 1/2 Zip Top - Men'sThe lightweight Nike Dri-FIT« Element Half-Zip Running Top is the perfect base layer with its soft, sueded Dri-FIT« fabric. Gussets at the underarms provide ventilation and maintain optimal temperature. Works great for both layering in colder weather or by itself on warm days. 360║ reflectivity optimizes visibility in low light. Thumbholes are available to keep the sleeves in place on cold-weather runs. 88% polyester/12% spandex jersey. Imported.