I am looking for the best nursing cover, can you help?

I fed my first son but I never had a nursing cover because I never fed him in any public area, so I would just go in a room by ourselves and take my shirt all the way off. This time around I'm thinking that I'd like to just do my thing wherever we are instead of segregating us to a specific room. Of course I would want to be completely covered and discreet so can you suggest a good nursing cover? Links are appreciated!! Thanks so much!