SPEAR (Special Operations Personal Equipment Advanced Requirements) jacket(manf by Adventure Tech). Polartec 300 fleece - very comfortable and warm. Non-binding and breathable. The pit zips are an absolutely essential feature for proper temperature control. It has a windproof front and back yoke, and reinforced elbows. The two internal pockets are also accessible through the slanted handwarmer pockets on the outside. Great all-around jacket.