... -degree Type-change and Indentation-proof Patent NO.:ZL200720305568.X ZL201030243817.4 ZL201030549291.2 ZL201130022066. ... high-quality TPU imported from Germany,which has the OPEC certification,The material usually been ... for well for 3 years.BreathableNo kicker port,lead to the Jam Pore,then the ... clean, and easily has residue of bacteria.Soft memory materials , easily clean and no damage of glasses, ...