The Adventure Hat is Sunday Afternoons signature hat style. Every inch of this hat is engineered for FUNctional sun protection: smart fabrics, customisable sizing, patented details, and a sun-conscious design with almost weightless UPF 50+ sun protection. Wherever your adventures take you—tramping, running, cycling, or a date with some salted caramel ice cream on a sunny deck—the Adventure Hat has you covered. Features UPF 50+ certified breathable sun rating (mesh vents not rated) 10cm downsloping front brim and 9.5cm sides with floatable foam core and poly brim wire 19cm back veil neck flap with lift-up tab Strategic mesh ventilation Water repellent and stain resistant Wicking sweatband Chinstrap with cord lock External sizing band for custom fit Lightweight: 84g Size Guide Small 51cm - 53cm (head circumference) Medium 53cm - 58cm (head circumference) Large 58cm - 64cm (head circumference)