Ooni Karu 16 Cover. When you're done cooking, protect your Karu 16 from the elements with the custom-designed Ooni Karu16 Cover. A super-snug elastic edge and an adjustable strap enables this 100% waterproof cover to easily fit over your oven. It hugs tight to the legs, eliminating slippage and providing the protection your oven needs when not in use.