“What a brilliant cap! I have a big dome and struggled to find a waterproof cap that fitted - an alternative waterproof had been bought that fitted like Billy Bunters school cap - perched on top of my head waiting for the first breeze to remove it. I’ve bought three of these from V&P as one was pinched from me and I now have the black and the dark green versions. These fit really well and are a genuine one size fits all with a decent range of secure adjustment to fit all. The caps have been tested in torrential rain and work perfectly to keep the rain out off my face. I also wear one under my rain jacket hood for the same reason. Well worth getting one. I ordered mine from V&P and they delivered it quickly. I won’t go hiking / camping without this if rain is a possibility - & being UK that is always a probability!!”