Stitch-on 3M filter connector

thingiverse

This is a 3M-style filter attachment designed to be stitched on to leather or other durable material masks, or whatever else you may like to stitch it to. Holes should be ~1mm with ~6mm offset. I recommend printing in TPU for flexibility and durability, but other materials should work. I have designed a 2-part filter for 62mm makeup pads, but anything that uses the 3M bayonet (including their commercially-available filters) should work with this. The grooves are designed to match the 3M respirator I used as reference for the best possible fit, but your mileage may vary. Obviously, I only recommend this for costume details and make no claims to its effectiveness as PPE.