I am an Airkix tunnel instructor in the UK. We use Vertical suits because they are the most comfortable, best fitting and longest lasted suits we have ever tried. It is perfect for the tunnel, great power, no unwanted inflation and they last a very long time. My current suit is in its 14th month of use (50 hours wearing the suit every week & at least 20 hours actual tunnel time every week) and still hasn't got a single hole or tear in it anywhere!