I remixed the DtM (https://3dprint.nih.gov/discover/3dpx-013238) shield. I did not change any dimensions or fitment. I just remixed it for "vase mode" spiralize printing. this permits it to be printed in at least 1/3 the time (40 to 65 minutes per) and use less material. almost half the material at 27g

It is more flexible where it needs to be (head band) for comfort and is now an "open structure" which will improve sanitation. (IPA can now get inside. there are no closed cavities to retain anything)

I am including Gcode that should be compatible with any printer with a 200x200 or larger build volume. on some less capable machine you might need to slow down a little (try 75%) on better capable machines you might be able to go faster (diminishing returns its so fast now) The tricky parts are first layer. it needs to go down well and the "head visor" portion (over 12mm in Z) you might need to slow down for this or lower layer height for this if it gives you troubles.

I have printed it on 5 different machines from different manufacturers and no problems so far.

if you want to slice yourself.  use NO top or bottom layers and 1 perimeter in vase mode or spiralize outer contour mode.

MAKE SURE your "start point" if somewhere  along the visor arc (0,0 is usually good) as the transition at 12mm can cause "oddities" in vase mode if you don't make the start point in the "arc" of the visor.

if you get retractions and vase mode breaks enable thin wall compensation with 100% allowed overlap and the problems will go away. some parts of the model nearly intersect. this is to allow the reinforcement ribs that are vase compatible to "connect" the different perimeters for more stiffness and strength.

the THICK version STL is for LARGE nozzles. use regular vase mode for a 1.2mm nozzle for 1.0mm nozzles use an extrusion multiplier (EM) or Flow Rate of 1.25 for 0.8 mm nozzles use 1.5 You can use 0.6mm layer height for the first 12mm but NOT for the visor. 0.4mm max recommmended (the layers will fail at higher than 0.4mm too much horizontal deviattion per layer.

with the thick model this can be printed in under 40 minutes!! it will however be a little heavier 50g but also super strong and rigid.