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As someone pointed out - pointless. So many people have sensitivities to artificial materials (plastics). Do we really need more? Also does the material degrade in sunlight? Will it, at some point, collapse around your ears? Knowing what I do about the breakdown products of many plastics would I like to spend over half my day inside one of these structures? As an experiment it's really interesting, as a practical thing at this point in time, not interested.