Always the first question…And the answer is “sometimes”. There are a few variables, such as the distance of the shot and where it lands. Of course, the up close shots to bare skin can be a bit annoying. Long range shots to a padded/protected area of the body are frequently not felt. The worst case scenario is about the same intensity as a “towel pop”, and it can leave a welt and sometimes a bruise. Best case scenario is that you don’t feel the impact at all, and the referee will call you out, by seeing the impact.