This custom-fitted Mackie slip cover protects your Thump18Sv4 or other 18" Thump subwoofer during storage or travel. The nylon fabric guards against dust and dirt. You can even keep the cover on during load-in and load-out, using the convenient openings on the sides to carry your sub by the handles. If you're a gigging professional who needs to deliver floor-shaking bass, a sub is not optional. Keep your essential piece of gear safe with a cover designed specifically for your subwoofer. And with the Running Man logo displayed on the side, you'll show up at every gig in style, too.