Robinson Crusoe by Daniel Defoe Chapter 9 Page 39

but they were too hot to wear; and though it is true that the weather was so violently hot that there was no need of clothes, yet I could not go quite naked - no, though I had been inclined to it, which I was not - nor could I abide the thought of it, though I was alone. The reason why I could not go naked was, I could not bear the heat of the sun so well when quite naked as with some clothes on; nay, the very heat frequently blistered my skin: whereas, with a shirt on, the air itself made some motion, and whistling under the shirt, was twofold cooler than without it.

No more could I ever bring myself to go out in the heat of the sun without a cap or a hat; the heat of the sun, beating with such violence as it does in that place, would give me the headache presently, by darting so directly on my head, without a cap or hat