Kulots (spilling) or caprees r made with wide flowing legs made with a lightweight material & a cotton spaghetti strap tank with or without a lightweight flowery sleeveless shirt.

cotton or linen is best
you want a natural material b/c they breath
I think silk is also breathable
what you want to watch is what else is in it make sure it is 100% cotton or linen
do not get the form fitting
I find lose skirts & blouses
get the thinner ones
I am also very fare skinned so I get the long sleeve blouses and the skirts that are below the knee

I mind the heat greatly but I find having loose fitting clothing lets the breeze through and cools me off

this clothing also hides bruises , urine leg bags, beefs or pads

You might check out Columbia summer wear, They have a feature called Omni-Freeze, that has hydophillic rings imbedded in them that cools the skin. And if you perspire even a minute amount, it really kicks in and cools your skin up to 15 degrees cooler. I have one t-shirt that has this and it works very well. They use this in mens and womens casual wear and athletic wear, so they look like regular clothes but are so much cooler.

that sound very "cool" (pun intended)

I am in Australia & we had a very hot summer (some parts more so). I always wear pure cotton, not t-shirts unless loose & generally v-neck, round neck not tight, I wear long pants mostly or skirts that are below knee (mainly as I have a catheter too & it is easier than trying to keep it up higher).
I do usually have one of the neck coolers on & if hot & we are going out I take a small cooler (like 6 can) bag with ice block on bottom & spare neck cooler or 2 & can change,run the one you have been wearing under cold water (if can out in bow/sink even better) then back in cooler bag to get cool again.
There is also a thinner material that is cotton & that is great. Always wear loose & comfortable clothes as much as possible to keep cool.
This summer I wore a couple of dresses & tops I was lucky enough to get in Thailand, Bangkok & Vietnam & they were mainly loose & so comfortable, the tops were v-nick with elastic around the waist & a bit if frill(?) material from there down. The dresses had a pull in/drawstring under boob line & loose from there with slit up one/both sides. A lot of girls/ladies on cruise got shorter dresses like that too.
You can buy these on line, ebay is great, just be sure of who you are buying from etc as usual & I always pay paypal for safety.
Hope some of this helps.