Super light. It almost feels like there's nothing on your feet. These make the ride a lot more comfortable and responsive. The one thing I didn't like was the difficultly of the release. As I've used them more, they have loosened up a little, but still have difficulty occasionally.
These are my favorite pair of winter boots. They keep my legs and feet warm and dry for the cold winters here in CO. They seem a little on the larger side, but it allows me to wear thicker socks if needed.