Cool breeze mesh crown Solarweave fabric. 3 1/2" brim Aussie. The special mesh magnifies the cooling around the head. Solarweave fabric is USA tested to absord UV rays up to 50+ rating, the maximum rating available. Our Solarweave Aussie passed the UV+UPF test with over 40 washings. Each has the "cool-max" sweatband which wicks away perspiration. Stays on tight with it's chincord. Finally USA quality handmade here in the USA.