Inventive companies are adding tricot, xylitol and even coolant packs to masks as medical experts warn using them in hot and humid weather might cause health problems.
- Japanese firms rush to develop cooler masks as summer approaches The Japan Times
- Japan companies developing cool face masks as summer approaches ABS-CBN News
- Japan’s Coronavirus Numbers Are Low. Are Masks the Reason? The New York Times
- Coronavirus outbreak latest: June 7, 2020 Kyodo News Plus