Slides from Hava (Air filtration Scarf) deck
The campaign to donate scarves is found here
https://www.indiegogo.com/projects/hava-advanced-low-cost-air-filtration-scarf/x/142876#/
The campaign to donate scarves is found here
https://www.indiegogo.com/projects/hava-advanced-low-cost-air-filtration-scarf/x/142876#/