Sunday Afternoons Ultra Adventure Hat
This award winning UPF 50+ unisex sun hat keeps you well shielded from harmful rays. It's got slots for the arms of your sunglasses and the back brim is floppy so it doesn't get in the way of a seat or backpack. It has an adjustable strap to cinch it as tight as you need. To size, measure the circumference of your head where the brim of the hat would sit (above eyebrows and ears).