Coverking Custom Fit Car Cover for Select BMW Z4 Models - Triguard (Gray) Made from three layers of fabric for durability to protect against nicks, dents, and dings An affordable solution for long-term indoor and light outdoor weather storage and protection (not intended for daily use) Manufactured using unique double-stitching and waxed thread technology as well as the fewest seams possible to reduce 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