Portable Oxygen Recommendations?
Someone dear to me is going to high altitude (12,000 - 14,000 ft) for a couple of weeks and asked me about portable oxygen recommendations.
Any suggestions on a good value oxygen setup that'll be allowed on an international flight?
Thanks in advance,
Nothing in the world is more yielding and gentle than water. Yet it has no equal for conquering the resistant and tough. The flexible can overcome the unbending; the soft can overcome the hard. - Lao Tse