Coverking Custom Fit Car Cover for Select BMW Z4 Models - Mosom Plus (Gray) Made from a robust 5-layer fabric to provide comprehensive protection against all elements (including rain, light hail, and snow) The non-woven, layered construction is specifically designed for moderate to high weather conditions and outdoor use Manufactured using unique double-stitching and waxed thread technology as well as the fewest seams possible to virtually eliminate leaks and provide greater durability Tailor-made to the exact specifications of your vehicle's year, make, model, and configuration options Neoprene elastic tensioners sewn in the front and rear keep cover in place while the additional security grommets on outdoor covers allow you to utilize an optional lock and cable kit