Mezue ahịrịokwu na-esonụ: Onye mbụ jụrụ ajụjụ banyere parachute ya ma jiri ya mee ihe bụ "Nne Ukwu" Don Garlits. Ọ gbanwere azụmaahịa ya n'ọtụtụ ihe nchekwa ndị ọzọ, dị ka uwe aka, okpu agha, ihe mgbochi na akpụkpọ ụkwụ. Simpson chepụtara eriri afọ mbụ nke NASA, ebe ọ zutere Pete Conrad. Conrad Simpson webatara ngwaahịa DuPont Nomex n'afọ 1967. Simpson jiri ngwaahịa ahụ mepụta uwe ọkụ mbụ a ga-eji mee ihe n'ọsọ. Ọ kpọgara uwe ahụ n'ụlọikpe.
1967 Indianapolis 500 ebe ọ na-eyi site na 30 nke 33 ọkwọ ụgbọala. Simpson mepụtara ihe karịrị ngwaahịa nchekwa 200 na-agba ọsọ, gụnyere ọgbọ atọ nke uwe ọkụ. Simpson gosipụtara ịdị irè nke uwe ahụ na 1987, mgbe a gbara ya ọkụ mgbe ọ na-eyi uwe. Ruo taa, ndị ọkwọ ụgbọala na NHRA na-ezo aka na uwe ọkụ ha dị ka "Simpson Suit", nke bụ isi n'ihi eziokwu ahụ bụ na Simpson Performance Products bụ ihe kwekọrọ na uwe ọkụ, yana, ọbụlagodi taa, aha Simpson ka na-apụta n'ọtụtụ uwe ọkụ, gụnyere ndị ndị ọrụ nchekwa nchekwa nchekwa nke NHRA na-eyi.