My suggestion is to NOT rent a convertible in Maui in Dec etc. Get one with an actual real roof. The sun is very hot, the UV (A, B etc) are not good for homo sapiens, the car thieves love to cut-n-loot the converts, the "black snow" from H C & S raise h*ll with white/light clothing etc. My suggestion is to rent a nice small (compact) car for the mostly narrow roads and high gas prices.

Some people really take my nice advise.....others including my daughter, do not (she wanted and rented a convertible). And she got sunburn AND windburn. She sez it was "worth it".