What are insulated lunch bags lined with?!
What are insulated lunch bags lined with?
What is the name of the material used for insulation in and insulated nylon lunch bag? Thanks!
Answers:
Usually a thin sheet of foam. Usually no thicker than 1/4". Sometimes there may be vinyl layers in there as well. The more layers, the better the insulation, because each layer has a layer of air between it further adding to the insulation.
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