The Straits Times | Five things to know about choosing a good mask

What is a higher filtration capability? Which masks should be avoided? Do you need to wear two masks? Here are some things to know about choosing a good mask.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline