Cotton Round Filter Adaper

thingiverse

This cartridge fits right on top of your COVID-19 Mask's Filter_N95_connector. It lets you pop in any cotton round or filter you like, making sure it seals tight no matter the thickness. First, screw the adapter onto the mask's connector - then slide the Holder (that wagon wheel thing) and cap into place. Alternatively, I like to assemble all these parts: cap, filter, holder, and adapter. This creates a cartridge that screws right onto the mask. The cap is cleverly designed to draw in air from behind, minimizing exposure to those pesky droplets. It's essentially a modified version of AlphaA's cap.