Dressing at thirty degrees
Short answer: Thin, loose and light coloured, and change your underwear during the day. At thirty degrees dry clothing matters more than little clothing.
Why less clothing does not always help
Bare skin in direct sun absorbs heat faster than skin under a thin, light layer. A loose layer shades and lets the sweat evaporate. That is why people in hot countries cover up.
What works best
A thin loose garment in bamboo viscose or linen, light in colour, with room between fabric and skin. See bamboo dresses.
The midday change
A dry set of underwear after lunch does more for comfort than anything else. Damp fabric against the skin is what feels unpleasant. See bamboo underwear for women and bamboo underwear for men.
Frequently asked questions
Is cotton better than bamboo in the heat
No. Cotton holds the sweat, bamboo viscose moves it away faster.
Why do you sweat more in synthetic fabric
Because the moisture cannot escape and the skin keeps trying.
Does wearing a hat help
Yes. The head absorbs a lot of heat in direct sun.