IS 15298 is broader & the latest standard that covers all types of safety footwear including safety shoes and safety gumboots but IS 12254 is an older standard that is specifically for PVC safety gumboots. Our company makes all ISI-marked safety shoes in 15298 while ISI steel toe gumboot is made with 12254 standards. Only in the case of tenders and big quantities we make gumboots in IS 15298 standard.