Yes, it is absolutely important to invest in the covered wiper blades as they are more durable and sturdy as compared to the wiper with uncovered frames. The open wipers are highly likely to accumulate snow when they are not in use. For example, if you have parked your car in the snow, chances are the ice will be accumulated on the wipers sooner than you expect. That being said, it is important to purchase the wiper blades with a covered frame.