snap on clip for glasses and hats for face shield

thingiverse

These allow you to snap on a face shield onto your glasses or the brim of your hat. We use them to snap onto safety glass but they also work for normal glasses (depends on frame thickness). People who wear hats like them because they clip onto your brim easily. - designed for 3.2 - 4.0mm thickness when using PETG material. If you're using a more flexible material then you may be able to clip it on something thicker than 4mm. They have a lip that makes the shield kick out slightly from your face so it doesn't touch your nose. We have been using this for the clear lens...they aren't perfectly clear but good enough.... https://www.amazon.com/gp/product/B0015ZVXIW