Mission Charcoal Cooling Booney Hat. In under 30 seconds the MISSION Cooling Pinnacle Booney Hat cools to 30 degrees below average body temperature in 3 easy steps: Wet it, Wring it out and Wave it. The design and special features of this Booney Hat keep your face, ears, and neck protected from harmful UV rays with wide-brim coverage and UPF 50 fabric. For optimum comfort and function, there is an adjustable elastic chin cord, and rear strap for a perfect fit. One size fits most. Brim 3.25". Minimum size 22". Maximum Size 24". Trim 1 material 100% polyester. Trim 2 material 86% polyester 14% spandex.