What type of fabric can avoid us from feeling very hot?
Actually, there’s very little difference between wearing black or white material under a hot sun. While the black material does absorb more radiated heat, it allows less through than the paler material. Hold a dark and light piece of material up to a light and you’ll see (and radiated heat is just infra-red light, so you get the same effect). Of course, the hot black material conducts heat to the skin which balances out the greater transmitted heat of the pale fabric. Depends on the actual fabric, what is worn underneath it, the colour of the skin…