I will be sleeping in a small suv for a week at rtr. There will be no heating so that is a non issue but I would still like to have something for my trip. Any suggestions on a less costly brand meant for travel? I just read about someone who died sleeping in the back of a stationwagon in a closed parking garage. There was no heater being used and the car was not running but somehow something seeped in from another car. I did not get the full story and it sounded unlikely but there could have been a heating source under or in the garage that malfunctioned as well. This garage was closed and likely underground. I had never thought of this as being possible. My friend told me it can be dangerous to sleep in a car that is parked inside no matter how big the parking structure.