I'm interested in a summer-weight, reasonably breathable navy blazer for summer. I plan to have it made by MyTailor.com, which does most of my tailored clothing. I'm curious about whether the basic construction should change to keep it breathable and reasonably cool. In other words, is full-canvas the best construction for a summer-weight jacket, or is it better to move to half-canvas? Should the jacket be fully-lined or half-lined? Any other structural changes to consider to keep it breathable and appropriate for summer? I plan to use tropical-weight wool fabric. I started thinking about a change in construction based on the description of this Crombie jacket: https://www.crombie.co.uk/mens/navy-hopsack-wool-half-lined-summer-blazer-ss15.html. Thanks for any insights.