Although a suit looks simple from the outside, the internal construction can make a big difference to how it feels when worn. Pick tailoring with these features to tackle the heat.
PERFORATED LINING
It's a technique that's been used in performance outerwear too: add a perforated lining to a jacket and air will circulate more freely. It works just as well in a suit.
UNSTRUCTURED CONSTRUCTION
Traditional suits have several layers of interlining to give them a structured look. Unstructured suits don't have any of this - meaning fewer layers and better breathability.
HALF-LINED CONSTRUCTION
If you need a sharply tailored suit with traditional construction, it's possible to get one that's only partially lined in the body. This makes the whole thing lighter to wear.