A wide-brim hat offers significantly more protection than a cap, both from rain and the sun. The technical fabric of this hat has an impressive ultraviolet protection factor of 40were talking about excellent protection here. You can fasten both sides of the brim to the temples with snap buttons if desiredwear it as is, or like a bit of a Stetson style, or in the Australian style with one side up and the other horizontal. - Adjustable head circumference - Chin strap - Technical polyester fabric that dries quickly when needed - S/M: 54 - 56 cm, L/XL: 56 - 58 cm Musto is a trusted brand among sailors worldwide. Its worn by sailors who enjoy summer in a relaxed way as well as by those competing in the worlds most demanding sailing races.