Highlander - Survival Bag orange

Not yet had the opportunity to test, although the product corresponds to its description, it seems to me to be still light to be up to what one could expect, unless maybe I evolve in tropical environments, because I can't quite see myself surviving a January night at - 10° in this PVC bag that will retain all condensation and an ice bag will quickly come, finally this, However, it is still a survival tool, so use only in this specific case and in a suitable environment...