Lifelong mountaineer Larry Penberthy formed MSR with a single purpose: to improve the safety of climbing equipment. It was the 1960s, and the Seattle engineer’s independent field tests had revealed that gear was often failing at loads far lower that its advertised specs.

That one-man crusade grew into a pioneering gear company known for its cutting-edge engineering. Today, many MSR inventions are ubiquitous—remote-burner camp stoves, pit zips on outerwear, cycling helmets. But more important are the historic expeditions and outdoor adventures they’ve helped unlock around the globe.