Sun Blocker Unisex Outdoor Safari Sun Hat Wide Brim Boonie Cap with Adjustable Drawstring for Camping Hiking Fishing Hunting Boating 100% Polyester One size fits most men and women: brim front/back 4 3/4"; brim side 4", diam 25" Two mesh side panel design which greatly improves cooling and airflow, a chain strap cord lock mechanism and pull on closure to help keep your hat in place at all time, float core brim technology used in the brim allows for easy storage, hiding it in your luggage, or backpack when you're on the go or simply roll it up and put it in your pocket. UPF 50+ excellent sun protection, Anti-UV and vented Great for hiking, camping, fishing, tourism, gardening or any outdoor activity.