The Pakistani climber who summited Mount Everest without using supplementary oxygen is Sirbaz Khan.
Sirbaz Khan: A Pakistani Mountaineering Pioneer
Sirbaz Khan achieved a significant milestone in Pakistani mountaineering history. According to reports, he summited Mount Everest (8,849 metres) without supplementary oxygen. This accomplishment makes him the first and only Pakistani to have conquered 11 eight-thousanders.
