Nylon Plain back Adjustable snapback Cap Sizing: Max size of snapback hat is approximately 23 1/2" circumference with a 5" c Casual Flat Brim Snapback Hat For Fishing, Fishing Snapback Baseball Cap, Adjustable 5-panel Baseball Cap For Fishing, Adjustable Snapback Hat For Camping With Flat Bill, Adjustable Flat Bill Snapback Hat For Fishing, Adjustable Curved Brim Baseball Cap For Fishing, Adjustable Snapback Hat For Camping, Casual Snapback Hat With Flat Bill For Fishing, Casual Adjustable Snapback Hat For Fishing