Waterproof and breathable is a contradiction for the fabric we choose for the car cover, we get this super lightweight, and durable fabric from Medical Gown. To make the cover more breathable, we apply the two top windows to help this moisture get out more easily. You may also face an annoyed time that you have left your belongings like keys, phone, wallet, etc still inside after you have covered your cars, our zipper door will help you out.Wind protection is also very important in some places, like crosswinds, storms, hurricanes, etc. The two extra long tie-down straps with four tie-down velcro straps, which will keep the gears covered without blow-off.