The Outdoor Research Helios Sun Hat is a lightweight hat for spending the day under the sun. Paddle, fish, and hike, when the outdoors calls, this hat is the answer for UPF 50+ protection against UVA and UVB rays. The double weave ripstop Supplex nylon is water-resistant and durable, plus it dries fast. If it takes a dip into the water without your head, the foam-stiffened brim floats so it's easily snagged out of the drink.