Like I said, the multitude of cart cover options was starting to confuse me. So I went to Consumer Reports, not expecting them to have anything on the topic...but they did!
And it's right here. They focus on the health aspects of the cart covers (and whether they're worth it). I wish they had addressed the comfort issue, as well, but they don't really go there. I still thought it was a helpful article, though, in explaining what to look for.
Photo by orionoir. CCL.