Mostly, I'm using pads, now, but my observation is either it isn't really visible, or it is invisible to most anyone that doesn't have incontinence. Even gossips, who, if they don't know, will make it up. I like the idea of "relaxed fit", and longer shirts, which is what I usually wear, anyway. We might notice it and know not to pay attention to it.
A woman wearing a dress - as in with a skirt - might not show. Same for just a non-tight skirt.