Combat Waterfowl Waterproof Grinder Rope Hat The Grinder Rope hat is comprised of a waterproof, breathable and an incredibly soft performance material all over. This is an all-new and exclusive hat mold to us unlike any comparable blank on the market. Sure to quickly become a favorite. Snapback. Fit is approximately one notch larger than the common Richardson brand hats to expand the fit up to 1/4" based on how you wear it. Snap back One size fits all Snap back