Felting Noro Kureon

I have a couple of cardigans knit with Noro Kureyon that have become too baggy. I would like to try and felt them just a bit for a better fit. Any advice?

Welcome to KH!
This is such lovely wool yarn.
Be very watchful as you felt. There are sometimes problems with the body becoming narrower while the sleeves lengthen. This can happen quickly.

Thank you so much for your reply.