★ Diamond Shape Face Mask: Patented diamond shape 3D structure, makes you breathe and speak easily. Compliant with international certification standards, CNS14774, ASTM F2100, EN14683. ★ Face Mask for Drinking and Whistling: Special hidden opening design, for drinking, playing an instrument, and whistleblowing easily. ★ High Anti-leak Face Mask: Highly airtight, breathable, high filtration efficiency It can adapt with the earloop- adjuster to reduce discomfort and improve fitting when wearing the face mask. ★ FFP2 Respirator: 3D and Foldable type, both complied with EN149 certification. Suitable for medical and industrial dustproof use.