The usage of additional oxygen supply is extremely important when climbing high-altitude mountains because it can help you avoid numerous dangerous situations and even save your life. On Everest, we give each climber 11 bottles of oxygen (8 for you and 3 for your Sherpa), together with the newest mask and regulator (Summit Oxygen Systems). We run oxygen at a higher flow (2L/min) during the summit push, enabling you to climb more quickly.