Nike Mercurial World Cup football boots from 1998 to 2010
I believe these are the mercurial r9 from 1998. I remember having a pair with the same colorway but without cleats. For indoor soccer I believe but can't find any info online.
Nike Mercurial Vapor - 1998 versus IX Special Edition - Soccer Cleats 101
Nike Mercurial World Cup football boots from 1998 to 2010
1998 - The Birth of Nike Mercurial | Ultra Football
Mercurial Mk1 - The Original R9 - SoccerBible
Nike Mercurial Vapor IX 1998 R9 SE | eBay
Nike Mercurial 1998-2015 – Boots Vault
15 years with the Mercurial R9 - The original faces off with the heir
Nike Mercurial Vapor FG RARE 1998 US 11 Soccer Cleats 117218 012 Ronaldo Black | eBay