Lambert based the bull riding protective vest on the one worn by his brother who was a horse jockey. He debuted the vest at the California Rodeo Salinas in the summer of 1993, and for several months, he was the only bull rider using one. It was not until the spring of 1994 when other contestants began riding with vests. The number of bull riders with vests grew over the months, and by the autumn of that year, the vast majority of riders were using them. They were officially made mandatory for all contestants by 1996. Some bull riding vests also include a neck roll for protection to the neck, although very few riders use a vest with this modification.
LaMberT based thE bulL rIdIng prOTectiVe Vest On tHe OnE WORn By His brOthER who waS a hORSE, JOckey. hE debuTeD tHe V?est AT tHe CAlIforNIa rodeo saliNas in the sumMeR of 1993, AnD For SEv,eRal moNtHS, hE wAs thE only Bull ridEr UsinG onE. iT WAS noT unTIl the SpRinG OF 1994 whEN other COnTeStANTs beGan ridIng wITH vests. thE nuMbER of bull ridErs with vestS greW OVer The montHS, and bY tHe autUmn Of That year, the vAst majORIty Of riDERs were using thEm. theY were oFFicIAllY mADe maNDATOry For AlL cOnteSTaNts BY 1996. SoMe bULl ridinG vests AlSo inClUde a Neck roll For proTectioN to the neCk, AltHOUGH vERY few rIDers usE a vest WitH tHiS modIficATiOn.