This is my build of the Flexible Mask Valvy
See this YouTube video for more info.
https://www.youtube.com/watch?v=WeLnYqxD1JE

Updates:
2020-04-06 : new cap and cover for thicker pads
2020-04-05 : new grill and strap mount design
2020-03-25 : uploaded new version of 2 point strap mount, also in 4 sizes: the original (100%), 105%, 110% and 115% scales, all using the same filter cover
2020-03-25 : uploaded version with 4 point strap mount, in 4 sizes: the original (100%), 105%, 110% and 115% scales, all using the same filter cover
2020-03-21 : small improvement on the strap mount, STEP files uploaded for those who want to remix, bigger version 5% bigger than the original
2020-03-19 : based on Euter's comment, sealed up the mounting and strap holes. Redesigned strap mount.
Overview:
This face mask was originally designed for circular cotton pad as filter. Cotton pad is roughly 58mm in diameter and are readily available in the cosmetic's section of most stores. Pads can be made from HEPA vacuum cleaner bags, also several can be made from N95 masks, and other filtration media where applicable. Mask available in 5 sizes
Printing:
1) Choose…