Outdoor Research Seattle Sombrero 100% Nylon Imported Removable chin cord with cord-lock is long enough to allow you to drape the hat down your back when it's not needed. Foam-stiffened brim keeps its shape no matter what happens; it also makes the hat buoyant in case it falls into the water. Matching loop and hook tabs at the dome and the brim can be used to achieve just the right fit. A Gore-Tex fabric membrane ensures that the hat is windproof, waterproof and vapor permeable. The brim is longer in the back to protect your neck from the sun; it also works to direct water away from the neck, head and face.