Just a place to lay my head…
The following pictures illustrate the steps I use to make a headrest/vent duct for an Apollo helmet. The process is vacuum forming, and I am using a heavy ABS plastic. The vacuum source is my shop-vac.

Form or Plug

Side view

Pushing frame with ABS over plug
m

Just vacuumedready to remove

ready to remove

Ready for the Helmet

Prototype with Tamarra's vent pad
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