A tonneau is a cover for your Sportscar cockpit, and it is a very important component every open roadster owner should have. Here’s a video all about why they matter. We sell nice ones that are stretchier and that are more likely to fit. Just keep in mind that when you buy one, the fittings are not installed, so your tonneau has to be properly fit to your car, and that is often best done by an auto or marine cover professional to get the best fit.