Designing something to wear so you don't die in 150 degrees Fahrenheit

The first thing I was thinking would be something like mylar or white that would reflect both sun and heat. The Second thing would be something to refrigerate the air so it wasn't so hot when you breathed it in. One way might be to breathe through ice to cool the air. However, ice likely wouldn't last very long but might last if it was one big piece with a hole through the center where you breathed in through to cool the air so it didn't burn your lungs at 150 degrees Fahrenheit. You wouldn't want to breathe out through it though because it might cause the ice to melt faster.

Why am I preparing for 150 degrees Fahrenheit? Temperatures with a heat index of 165 to 170 degrees already occurred in Pakistan and India last summer and are likely to do this or even increase in coming years in these locations or others as time goes on. A heat index this high was reached when extreme humidity hit high temperatures so people were dying who couldn't get into air conditioning or put some ice on their foreheads, the backs of their necks or wrist arteries on the inside of their forearms.

By the way 150 degrees Fahrenheit is 65.5 degrees Celsius approximately.