100% nylon. Ripstop fabric. Five panel construction. Detachable neck guard with toggle fastening. Adjustable strap. The Flyweight Sunshield Five Panel Hat from The North Face not only looks top-notch upon the ol’think tank but actually serves a very important purpose and that’s stopping havoc-wreaking sun blasts right in their line of fire (that being the usual neck ‘n’ nose regions). This one also benefits from some of that seemingly impermeable nylon ripstop fabric, so it’s going to be stout in rogue downpours as well.