The mosquito net.
This is malaria country. I got properly immunized against all sorts of disease prior to leaving on this trip, and took along an array of medicine to ward off even more. But malaria is a distinct possibility in some of the places we were visiting, so sleeping with mosquito netting was a matter of course. Regardless, I was eaten alive. My legs looked like mosquito pin cushions - lovely - and I was an itchy scratchy mess. I know, boo hoo.