I use a camouflage Gortex Bonnie hat made by OC Gear. It has an elastic pull cord, adjustable hat band for the real windy ridges and a stampede string to keep it around your neck, if it does blow off of your head. That stampede string saved it for me one cold day crossing the river in my boat. Closest thing to our old Army issued boonie hats from the VN era. I picked mine up at Sportsman's Warehouse for about $20.00 Probably my favorite piece of hunting clothing....next to my boots!