I have one too. They work great. Any can be used with stock mirrors. Some are made to cover only the top half, others have the flaps that come down to cover the door opening when the doors are off. The Mirror, in stock position, is far enough forward that it doesn't interfere. If you have steps/rails that are out from the side of the body, then the flaps won't fit snug against it - still holds out water and rain, but critters may get in.
It's a Jeep Thing ... I do understand!
1993 Jeep Wrangler - 2.5" RC Suspension Lift, 31" Mud Tires, powered by 4 angry squirrels