In the scene they’re cooking on the desert. The sunglasses she’s wearing are pretty close to Ray Ban Caravan model but they don’t seem the same to me. Please some one help!

I read that people wear sandals in the desert because it keeps your feet cool. But I read that the sand in deserts is more than 150 degrees. If that’s the case, how can you wear sandals when the sand is that hot? Your feet would fry.