This is the perfect color - a nice iron gray, not heathered like most gray fleece.  It's about as warm as a regular sweatshirt.  The zipper, however, is very cheap, and the jacket will come unzipped from the bottom up if you pull on it, even gently.  I also bought one in navy blue, and that one had the same zipper problem.  So it's nice if you don't want to wear it zipped, but that didn't work for me.  Neither of them will stay zipped, so I wound up donating them.