The Islays would work really well with the fabric as well. This tweed is quite lightweight so I don't have to wait until the coldest days. Perhaps a lightweight tweed jacket might be a better option than a full suit. I would comfortably wear this jacket in a temperature that's in the mid to high teens but that's about as warm as I would go. I run cold so I like the warmth most times. The boots would work well with denim as well.