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The Design Differences Between Quickly-Evolving Face Shields
The face shield design I just released myself just uses a single material (PETG) and folds together. I've found the plastic headband to be quite comfortable because it uses a ratcheting action to finely adjust to the user's head diameter. Here's the project page: http://www.designconcentric.com/origami
There's a new version of the PRUSA that was redesigned by Design that Matters and is approved by NIH. It incorporates a brim on top to protect the wearer when they're looking down.
As I've said in other postings online, being fast to production shouldn't necessarily be the goal. Most of the Apple face shields will have to be disposed of quickly, where other designs will be able to last multiple shifts after cleaning. Smaller clinics are preferring designs that can last a week or more, being sterilized each night.