When the trail stretches endlessly under blazing sun or you're paddling exposed waters with nowhere to hide, the Outdoor Research Sunbriolet Sun Hat becomes your essential shield against UV punishment. This lightweight adventure companion delivers serious UPF 50+ protection through its bluesign® approved nylon construction, while the intelligently shaped wide brim provides comprehensive coverage that actually stays put when the wind picks up. Strategic mesh panels keep your head cool and comfortable during those grueling ascents or long days on the water, while the crown cinch and detachable chin cord ensure this trail-tested hat won't abandon you when you need it most. At just 86g, it's the kind of reliable sun protection that disappears on your head but never fails to deliver when you're caught between dawn and dusk with miles still to go.