Jim Burns wrote:
Do you own/rent/borrow a portable oxygen system?

I own an Aerox (two places regulator) with a "M" tank
(22 cu feet at 2216 psi) which I use mostly with an
'oxysave' canula;

The reviews I read were saying the aerox regulator
was most reliable -- note that the regulator is what
makes the difference really between brands, tanks
and canula/masks being pretty much the same -- and
I picked the "M" tank because... well, dunno :-)
looked like the best comprise between size and capacity;

I use it if I plan on spending some time above 5000 at
night and 10000 during the day and during long cross
country (much less fatigue at the end);

--Sylvain