This is fixed, remeshed strap for RC3 mask. It enables wearing Europa V3 short version for wearers up to 60+cm of head circumference.
Print time for single is about 13min.
0.4mm nozzle, 0.25 layer Noctuo PETG Medical.
Presented 3mf file includes 8 straps.
Edit: In V4 I've increased height a little. Now it prints as three layers in 0.25mm. Much stronger.
The author remixed this model.