Unusable Even in an Emergency

An avid Bushcrafter I have to even attempt daring and placed me for testing with this emergency sleeping in a hammock under a tarp as rain protection in the forest. There were evening about 10 degrees Celsius.

I can after that night just absolutely advise against this product!

The sleeping bag held about 2 hours warm, but because of the sleeping bag is just a plastic bag with no air circulation opportunity arose in these 2 hours of sleep I had, despite the crackling inside the sleeping bag so much condensation that soaked my clothes. I woke up after about 2 hours on a very staple clothes and I was damn cold.
I got out of the Knistersack and now used it as a base in the hammock to no cold to get in the back. But he just seemed so appropriate, but that every emergency blanket for a much lower price may be just as good, if not better, as it has a circulation of air.
The rest of the night I was shaking me then in my damp clothes through the night and it seemed warmer outside than in sleeping bag from the bag.
As an insulating layer on bare ground, I would also advise against this part, because although it reflects a little body heat, the cooling down by cold floor but more heat escapes as the body produce and the bag can reflect.
After the night I watched the Knistersack then on again more closely. Inside, the coating was scraped through my clothes to such an extent that one could see through the bag was damp inside which is not necessarily the insulation contributes as you can imagine.
Conclusion: Who should come in an emergency or if it is only a traffic jam on the highway is better off with a normal emergency blanket or a blanket or a sleeping bag should put in the car.
To extract water from the body's own juices Knistersack is however very useful ....