You need to have a printer with minimum 300x300mm size. Only there you can print it diagonal. No brim is needed and no skirt.
(The picture is the older version, the new one has got two reinforcements inside)
This is a flex-band for the Prusa MK3 face-shield.
Print it from flexible material!
This makes an need for rubber-bands obsolete.
Make sure to have enough walls and enough top and bottom to avoid infill.
Stay safe and healthy!
Printer:
Artillery Sidewinder X1
Rafts:
No
Supports:
No
Resolution:
0,2
Infill:
doesn't matter
Filament: Sainsmart TPU TPU doesn't matter
Notes:
See above