To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
These are the best to keep in your car esp during the winter in case of emergency !! Or in your backpack, you never know when the weather might change !!! Or heaven forbid you get stranded !! Takes up almost no room !!!