CCC231 External waterproof car cover, for all 911 models without fixed rear spoiler. Monsoon covers are extremely sturdy and are often used for vehicles that are stored outdoors or in barns on a long term basis or for vehicles that are only driven at the weekends. The Monsoon is a winter car cover for use in temperatures below 70f / 21c. If you require a year round cover, we suggest that Stormforce will be a better option.