Made from recycled Nylon, our Feverfew boonie hat not only keeps your face and neck protected from the sun, but also keeps fabric out of landfill. It's a win-win! Our Boonie Hats are one-size-fits all. An adjustable toggle on the back of the hat means it can be adapted for a snug fit. Total diameter: 30cm, Brim: 5.5cm , Height: