Perfect over sports bra!
"I got this for a bit more warmth on morning walks where it's a little chilly to start, but will rapidly heat up over the next hour or so; and it's perfect that! The material wasn't as soft as I was expecting for fleece (feels more like terry-cloth to me), but is still very comfortable. Given where it crops, I think pairing it with just a sports bra and high waisted biker shorts is great - but not as flattering with a full tank top underneath."