Hook and Loop closure?? 100% Premium Cotton / 3 Panels Layer Design with Route 66 Road?? Material : 100% Premium Cotton [ Made by High Quality Premium Cotton ]?? Adjustable : Velcro / Men & Women Fashion Accessories Head Wear !?? One size fits most with adjustable Velcro, fitting up to size 7 1/2 ~ x Large?? Size Fit to All Adjustable by Velcro Away from too tight or too lose and enjoy the perfect fit.