You need to work up the muscles or you will get injuries. By some miracle only 3 black flat washers were missing, which as luck would have it I had just barely enough spare ones in my home tools/supplies. Very high quality look and feel to them. They have a firm grip on my head and they stay on when looking down or quickly turning my head. It is not a good g quality crocs. Yes, I gave a five star rating and I hate them. Read some issues with noise. They did finally offer to RMA it after about a month of waiting, but again, did not read any questions I had as I was asking things in our back and forth (assuming its not just a bot/copy paste, which it certainly seems to be). I don?t care about it being waterproof but the way it fits I believe it is. 2) The second reason was the price.