Winter clothes

I'm surprised to see the guys wearing sweaters, beanies and jackets, seems like they had some decent clothing to provide isolation in cold weather. They also had the dead passengers' luggage at their disposal to add on more layers of clothes.

I know they lacked waterproof clothes and boots to walk on the snow (their intention was not to land on a ski resort). But still, I'm sure the clothing they had helped them a lot to cope with the cold weather. It was spring in Uruguay and Chile, had they been heading to Brazil with a luggage full of shorts and t-shirts they don't survive the first night.