Chaos - CTR Stratus Boat Hat 100% Polyester Imported Anti-Microbial Mesh for comfort Chaos-CTR Stratus Boat Hat features a Waterproof breathable laminated performance fabric and taped seams guarantee to keep you dry in all conditions Internal cinch Cool Max sweatband size adjustment feature allows you to customize your fit Removable chin strap insures hat won't fly off in the wind Anti-Microbial Mesh for comfort