Mask back ring 口罩背扣

Surgical mask ring 口罩背扣

In the recent Covid-19 virus outbreak, surgical mask wear become necessary.
Some surgical mask size maybe too large for lady or child.

This back ring can tighten the mask and improve mask fitting. It can reduce strain caused by mask earloop.

This back ring is easier to apply than back strap.

This back ring is 3mm thick for better rigidity.