I was watching the patrick johnson interview where he talks about the navy cotton suit being a wardrobe staple. Makes sense - cotton is cooler in summer, takes to dye better and is more flexible than wool (can be dressed up or down etc). Would cotton be acceptable in an Australian business/work environment though or would nobody know the difference?
Cotton suits are not cool (temp). Linen is what you wear in summer or super light weight wools that act like linen.