We give you a very generous supply of oxygen for all of our Everest programs. In general, we plan to run a generous oxygen flow of 3L/min or more while climbing, and 1L/min sleeping. With the advanced technology of our hyper-efficient, state-of-the-art SummitO2 oxygen masks, this is usually more than enough. We give you 11 bottles (8 for you and 3 for your Sherpa). So, long story short is you don’t need extra oxygen.

However, if you can afford it we generally recommend purchasing extra oxygen. We consider it cheap insurance. With the extra oxygen, you can run at a higher flow rate which will keep you warmer, allow you to move faster on summit day and allow you to be less-exhausted when you return to the South Col, all of which goes a long way towards keeping you safe. Also, if you get delayed due to weather at the South Col for a day, need to turn back on your first summit attempt for any reason, or miss thread your bottle which can periodically happen, having the extra Os may save your summit bid. You have already invested a huge amount of time, money, training, and mental stress in to your Mt. Everest climb- I see the extra oxygen as cheap insurance to stack the odds in your favor.

The extra oxygen option buys 3 more bottles of oxygen delivered to the upper mountain (we will discuss strategy on how to best use this extra oxygen). With the extra Os you can run high flow (4 – 5L/min) throughout summit day, start oxygen at Camp 2, and/or have a bit extra in case of delays at the South Col etc.