91% polyester 9% spandex matte supplex with 95% polyester/ 5% spandex pique 8.5 ounces Dryflex panels. A breathable 4x4-stretch body with contrast Dryflex insets that provide ventilation and increased mobility where it counts. With features like a windblock center zipper, stretch-nylon flatlock seams, and a raglan seam, this layering jacket is well suited for a variety of activities.