Mine are panelled up so somewhere between the two. When closed they look like a solid single panel but they are actually three horizontal panels. They re more secure than standard single panel up and overs but less commercial looking, less expensive but less secure than the roller shutter type, or at least were when we bought them around 10 years ago. I am very pleased with them. They work well and easily, have keyfob remotes and I have just bought more remotes cheaply enough on Ebay and programmed them myself. I honestly couldn't comment on security but the old up and overs were even less secure.