Review on Convenient Mask Storage Case: Neoprene Holder with Zipper & Carabiner - Stylish and Portable Clip for Cloth Masks - Perfect for School, Travel & Everyday Use (1 Pack, Diamond Design) by Adam Jackson

So I'll start with the pros here: The size of this zip-on thing is perfectly adequate for storing a couple of your favorite Covid masks (although it could be a bit smaller and less bulky even for that purpose). Now for the cons: I'm not sure if this "sleeve" isn't just a cardboard sleeve with some sort of sub-polyester "cloth" artfully glued to it. The outer fabric looks like it was cut from an unsold "sexy caveman" costume from a Halloween pop-up store. The zipper looks a bit plastic, but can be closed. Bottom line: I don't know what you intend to use this for, but as someone who has attempted to use this item for themselves, I agree. Thereon. There are much better zippered pouches, this one is very "furry".