Yoder Smokers YS640 and YS640s Competition Cart Grill Cover This heavy duty custom cover is designed to fit your Yoder Smokers YS640 and YS640s on Competition Cart. This newly designed cover features a weather resistant liner to stop water intrusion and is fitted with vents to mitigate condensation. This will keep your grills surface dry when not in use. Heavy-duty clips fasten the cover tightly over the shelves to keep out rain, wind, snow and other elements.