If you need more air (and please don't blast me for this!)
Get the POD....it's made in Breckenridge and sold in the pharmacy/vitamin part of Walmart!
It is the size of a small small can of hairspray and has 40 to 50 breaths.
It is for hiking/biking, etc and gives you the "boost" and.......helps with altitude!!!!! Also very good for hangovers but, I digress!!!
POD stands for....personal oxygen device and,..it weighs nothing!!!!!!
I think everyone should get one just because!!
It is as small or smaller than your typical bottle of water and is super lightweight!! When I checkout in Walmart, the cashier often says "is there anything in this?"......It's 95% oxygen and 5% nitrogen.
When my DH takes a few breaths (for whatever reason

) he's up at night! DO IT!!! It certainly can't hurt!!!!!!!!!!!!!!!!!!!!!!!!JMO!!!!!!!!!!