Another vote for Covercraft. Go to their website and study the different styles. They have different purposes depending on where you park and what you want to protect the car from. They are not cheap but are very good quality and have a good warranty. My Z is covered daily in the parking lot where I work and my goal was sun and dust protection. My only beef is that the seams started to come apart about three years into the four year warranty. They replaced the cover at no charge, and three years later the seams started to come apart again. I suggested to Covercraft to have their engineers check with their fabric vendors and specify a tougher thread for the seams, even if they had to increase the cost slightly. They politely ignored me. When this new cover comes apart I'll find an upholstery shop and have them run all the seams through an industrial sewing machine. The cover material still had a few years left in it but the thread for the seams rotted out.
