I purchased the Seventy2 a few months ago and just leave it locked in my truck tool box waiting for the day I get to play the hero. But after the wildfire season we've had I bought the refill to add to my kit for my wife. Everything else is sharable between two people but this was mandatory for me. You're not gonna be able to get anywhere if you cant see or breathe. Love the mask, really good quality and fits over my beard. I also like that the goggles can fit over glasses if needed.