Simple remix of the Larger size from the original listing.
Changes: -Heart hole shape for supply to #NHSHeroes -Slightly strengthened connection to first triangle from middle with increased width, based on a couple of failures in the field. -0.7mm stl model height
In the first wave in 2020 I made over >10 000 of the original ear relief strap https://www.thingiverse.com/thing:4281125/remix
A lot were used in a large factory. Feedback from operators using them daily in hot environment shifted me to this design: https://www.thingiverse.com/thing:4281125 over 1000 of the angled remix design were supplied in Q3 and Q4 to my factory worker colleagues. Much better feedback due to the angle for long term comfort. Can be worn at neck level or above ear height using hair clip through the centre.
Only listing the one size as after getting feedback this one worked for everyone as it covers a broad size range.
Amazing thing about this design is pennies to make, minutes to print and 1000's can be made on mass easily. Printed in PETG there are many still under daily shift work use that haven't broken!, testament to good design.
Print settings are critical to get it right with PET G however so please read carefully below.
Do not print in PLA unless intended to be single use as PLA cannot be sterilised with alcohol etc unlike PETG.