N95 Mask Cinch

Designed to take up the slack when the elastic straps on N95 masks begin stretch and weaken.

1) Run strap through the nut and ensure roughly equal length on each side of nut so its centered
2) Screw nut onto base ensuring strap lays in the cutouts on the base shaft
3) Adjust slack as needed then tighten nut
4) Repeat for other strap

Note #1: This has NOT been tested by medical personnel.

Note #2: a commercial solution would be a cord cinch like the one below. Not sure if it would hold tightly or not. This 3D printed design holds very tight when the nut is tight

https://www.amazon.com/Plastic-Spring-Toggle-Stoppers-Multi-colour/dp/B01FH9DYU6/ref=zg_bs_17545028011_1?_encoding=UTF8&psc=1&refRID=5F84KPGTX8X89GDKGBB3

Update: Added picture of a mask similar to N95 type.