I'm interested in getting a supply of CPR masks for my EDC, backpack as well as for the car and home kits.

I searched, and while there are a number of threads that mention CPR masks, I thought it would be worthwhile to have one thread where we could collect information specifically on this topic.

I'd be interested in features discussed.

I'd be interested in hearing about specific makes and models.

Interested in sources.

To get things started, I'm assuming the primary desirable features are a one way valve and filter?

I'm a bit fuzzy how compact such a model can actually be.

In any case, please give your thoughts.

Thanks much,

-john