If the garment is made out of cotton or linen, it should be very comfortable in hot, humid climates. Both of these fabrics are excellent at "wicking" perspiration away from our bodies.
Think the movie, "Casablanca" and the linen suits, etc.
Many of the shirts and garments worn by folks in the Philippines are made of cotton and/or linen for obvious reasons.
The downside to cotton and linen is that they have a tendency to wrinkle. They are both natural fibers and that is a characteristic of them.
If you want to use cotton/linen to for vacation wear, you should be very comfortable temperature-wise. However, whatever you pack will arrive at its destination fairly wrinkled. You choose your poison.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!