O2 Bag comes loaded with the gas

For the adventure traveler the backpack is the most important gear. It usually gets stuffed with clothes, Swissknife, food, equipment etc. but supposing you're about to undertake a trek to the Himalayas or the Alps you will need more than just the regular stuff. You will need Oxygen! So how about a backpack that includes a battery-powered oxygen generator. O2 Bag from Japanese adventure supply company, Ymup comes equipped this. The battery lasts up to two hours, time will...

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