If she had been carrying a waterproof breathable shell jacket and trouser i.e. Gortex with appropriate cold weather gear such as gloves, bivi jacket and hat etc and the ability to light a fire, she wouldn't have needed the garbage bag and most likely wouldn't now not be being treated for frostbite (probably lost a few fingers and toes to the hospital waste disposal garbage bag) and hypothermia.

The garbage bag isn't a good idea and promoting garbage bags as any form of protection against cold conditions over being properly equipped in the clothing dept is a poor headline.

A MVP material is always preferred over a non MVP barrier material in cold conditions as moisture will build up in the insulation materials next to the skin that are working and degrade them to point that they are actually making the situation worse.

Garbage bags are generally bad idea unless using them purely as a wind break. Carrying a woollen jersey is a much more sensible idea.

Should have brought along a proper windproof jacket such as Montane Jetstream.

The Surviva jak is a non starter IMHO

http://www.youtube.com/watch?v=21opH5jFles

http://www.youtube.com/watch?v=F5-A2va72Fc

They will probably sell a huge number to the unsuspecting.