I'm about to have a suit made in a relatively open-weaved cloth that should be wearable for Spring/Summer/Fall (and possibly Winter), and was hoping some of you more experienced suit-wearers might give me the benefit of your knowledge. The issue is the following: I like the weave and hand of the 12oz fabrics compared to the 8/8.5oz ones, but (at least in a lined suit) this seems too heavy for Summer wear. If I have the coat made unlined, will this make it light/breathable enough for warm weather? Of course, there is the weight of the pants to be considered as well. As a side question, what weight cloth can be used in an unlined coat? I've heard various terms for the amount of lining (or lack thereof): "half-lined", "unlined", and so on. Does someone have an idea of the different possibilities here (or even better, some images)? Thanks in advance.