Kirui died on May 23, 2024, while attempting to climb Mt. Everest without supplementary oxygen.

Despite meticulous preparation and an unwavering resolve, Kirui tragically lost his life during the final ascent.

In his latest Instagram post, Kirui expressed confidence that he could conquer Everest without additional oxygen.

The lack of oxygen, according to Muhia, is why most mountaineers use supplemental oxygen the death zone.