The unisex Peter Grimm Palmeras Lifeguard is hand-woven into a Matt Weave and made from 100% straw. The 4.25-inch brim and premium underbrim lining provide excellent UPF 50+ Sun Protection. An adjustable chin cord will keep your hat secure on a windy day. The elasta-fit comfort band allows enough stretch to fit most men and women. One size fits most.