As for the origin of Avalon, neither German Freudenberg nor Nanjing Zongjia Company gave an official reply. So it is impossible to know whether it is genuine or not.
As to which is better, Tyvek or Avalon, the effect is almost the same, because the anti-mite test report of these two fabrics shows that the anti-mite rate is the same. However, there are differences in hand comfort, durability, cleanliness and service life. Comparatively speaking, German Avalon is better.
Please consult Nanjing Zongjia Company for specific product knowledge. I will definitely give you a more detailed and professional introduction.