Preparing to Summit Mount Everest Without Oxygen

James McManus, an Irish adventurer, is aiming to become the first person from Ireland to climb Mount Everest without using supplemental oxygen. After undergoing extensive acclimatization on the mountain, he completed his final acclimatization rotation, reaching 7950 meters. This challenging process involves adapting his body to high altitudes, with the ultimate goal of summiting Everest at 8848 meters. Climbing without oxygen requires more acclimatization rotations and slower progress, presenting a significantly greater physical and mental challenge.