Originally Posted by thinman
I wore a hopsack, half-lined blazer regularly when I lived in Oklahoma. It was relatively cool, though linen would probably be better in the summer, if your business environment can tolerate the wrinkles. My blazer is custom-made, so I don't know where you can buy one OTR.
The OP might also want to consider lightweight wool/silk mixes (Zegna are the real specialists in these) and tropical weight wools or Minnis fresco. Linen isn't necessarily that cool either - it depends on the weight and weave. Some linens can be rather heavy and not particularly cool. And of course it also depends on the structure and lining.
I just don't do very well in hot weather and I just prefer a lighter weight suit when travelling - so I'm having an RAF blue fresco blazer suit made up now. Blazer suits are a bit of an SF thing (see @Claghorn's fits for some really nice examples) - basically you have the jacket made up so that you can easily use it as a casual suit jacket or a blazer (patch pockets, horn buttons etc.) and so you effectively get the basis of two outfits for the price (and bulk) of one - which is quite handy when travelling.
Edited by FlyingMonkey - 7/30/14 at 10:27am