No offence intended but this is a recipe for certain death if you think a Draeger ten minute escape set is going to help you in ANY recreational underground situation. On the contrary, it will only complicate the Coroner's report. PM me if you need to know why you shouldn't be selling this item to mine explorers. To anyone else, I'll explain why it's of no practical use if you need me to?
The old saying "Educate before you experiment" applies here!