The IG Extreme 45+ UV Protection Outdoor Cap with Cape has some great features and does a good job blocking the sun.  I wasn't sure what I wanted when I ordered, so I purchased this one and another one (the other has a wrap around brim).  Both are comfortable and can be cinched up to be tight on the head.  This hat is made of a fabric which doesn't seem to breath as well, but would likely be more moisture resistant.  The cape from this one lies close to the ears; its not bothersome, but it turns out I prefer the other hat's brim and fabric a little better.