Rubber band adjuster for face mask

thingiverse

Being in the midst of a pandemic, most people are required or at least asked to wear mouth and nose covering masks in public places. To keep the mask securely in place, we often use simple 5mm or 8mm rubber bands (even if they can be difficult to obtain lately or sell for unfairly high prices). This small and very basic piece of plastic is used to easily adjust the length of the rubber band to make the mask sit tightly and comfortably. A dozen of them can be printed in less than an hour, so makers like us can produce them in large quantities and distribute them among people around us. My design for a face mask clip that can hold any type of filter material with a magnet-based quick release mechanism is available here: https://www.thingiverse.com/thing:4316165 Since precise prints are essential to making the clips work best, I have uploaded an additional version for the 5mm clip (which is more critical in terms of dimensions) for budget printers like my Ender3Pro), which tend to produce slots that are about 0.3 mm smaller than they should be. Printed on a Prusa i3 Mk3S, the parts come out with the designed dimensions directly, so users can use the normal 5mm file. Have fun doing something good for our society and stay healthy!