 The boot is also part of the successful ACC collection by Nike which basically is an element of control in wet weather conditions.Finally the Synthetic finish weighs in around 6.9oz while the leather finish weighs in at 6.7oz.In May 2013 a limited edition 1998 Mercurial was unveiled in the current Vapor IX model where only 1,998 pairs will be sold to celebrate the 15 years of the Mercurial range and it features the same colourway as the 1998 Nike Mercurial worn by Ronaldo at the 1998 FIFA World Cup.