The Covercraft Reflec'Tect Custom-Fit Outdoor Vehicle Cover - Silver # C11962RS referenced in your question is confirmed to fit your 1988 Porsche 911 Coupe with the turbo/whale tail spoiler. The lightweight, woven fabric is indeed machine washable and dryable (low heat) in home units.
The cover features 2 built-in mirror pockets and 2 grommets are included to create a hole for the antenna. This will do a great job of protecting your Porsche from UV rays and all types of inclement weather. view full answer...