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The casing (body, clip and push button) is made from plastic-free, bio-based biopolymers (PHA) that are also biodegradable. Microorganisms synthesize PHA through fermentation and break it down again in the sea, fresh water or the soil – something they have been doing in all natural environments for millions of years. The creation and degradation processes follow nature’s own carbon cycle. Certified by TÜV Austria. The QS40 True Biotic combines maximum sustainability with top-quality design and workmanship.