Many convertible cars have roofs made of fabric, which is usually multi-layered to keep the cabin as quiet as possible when the roof is up.
Convertibles with retractable metal roofs tend to be much quieter than those with fabric roofs when it comes to road and wind noise. In some cases, they can be as quiet and secure as a regular hard-top car.
But metal-roofed convertibles tend to be heavier, which can affect fuel economy, and the mechanisms used to retract the roof can take up a lot of boot space when compared to convertibles with fabric roofs.
Some convertibles also offer a detachable hardtop. While some of these can be stored in the car’s boot, many can’t and so have to be left in a garage or storage. With so many improvements in retractable roofs, detachable hardtop are much less common nowadays.