A good straw downturn brim hat is ideal for fending off the sun’s harsh rays. These brims can’t be snapped to an up position like they can on a straw fedora. That means you have better solar protection on your face and neck. Straw Downturn Brim hats come in many shapes and sizes with the brims varying in width and the crowns featuring either teardrops, center dents, optimo designs or pork pie shapes. A panama straw downturn hat has a weave that starts in the center and works its way outward.