INCODER_ Nynodal™ mask chainProduct Details : The paper clip style buckle simplifies the process of assembling and makes the connection with the mask more stable. The segmented connection design makes the angle of the mask chain more flexible, and it can hang more smoothly when wearing. Nynodal mask chain" is designed to reduce the discomfort of long term wearing and contact. We use plastic fasteners that are light and have no foreign body touch. On the one hand, they can be