In this picture you can see a sleeping tent. Some of the tents are more luxury than the others, but you have to know that accommodation in Wadi Rum is basic.
In this big tent sleep several tourists one next to the other. During the day the tent gets very hot, but don't worry, at night temperature drops a lot. Before you come, ask your guide if you need to bring sleeping bags and towels.
If you are more adventurous, you can bring your own tent and camp in the middle of the desert.