Who knew one of the biggest crazes in the World Cup would be a credit to Gareth Southgate's fashion choices?

The England manager's waistcoat has formed a major talking point in England's run to the World Cup semifinal, sparking a waistcoat craze across the United Kingdom.

Stores have pushed waistcoat sales as England advanced to a World Cup semifinal clash against Croatia in Moscow tomorrow morning, with people taken by Southgate's style of wearing a vest without his suit jacket, AP reports.

Southgate, who was surprised by the vest craze, said he never considered himself a "fashion icon" but loved the enthusiasm from supporters across the UK.

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"I was not a renowned fashion icon throughout my playing career, so it's rather strange to feel that way now. But we are really proud of the support that we are receiving."

"We've had the chance to make a difference. Our supporters, our country has had a long time of suffering in terms of football, and the enthusiasm they have for these players, because of the way they've — not only the way they've played, but the way they're conducted themselves, they've been brilliant ambassadors for our country, and I think everybody can see that they're proud to wear the shirt."

While Southgate's waistcoat accumulates national attention, another item worn by the Three Lions boss has been credited with bringing luck to the team in Russia.

According to the Daily Mail, Southgate was bought a friendship bracelet by his wife and children prior to the tournament and has been wearing it throughout England's journey to the last four.

The bracelet was bought from Monica Vinader, who have since seen sales of the £115 (NZ$223.89) item rise by 350 per cent.

As England progress closer to claiming the title for the first time since 1966, Southgate also revealed he wasn't actually able to listen to Three Lions for 20 years.

Three Lions has become the anthem of England's World Cup campaign but Southgate said that such was the pain of his penalty shoot-out miss at Euro 96, when the song was first released, that he could not bear to listen to it again.

"Football's coming home, I couldn't listen to it for 20 years, frankly. It has a slightly different feel for me, but it's nice to hear people enjoying it again," Southgate said.

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"I would just walk out of the room, it is an anthem and has followed the team for a long time but involved some difficult moments as well."

"Of course, the tournament ended in disappointment and it is nice to be able to put a different frame on it now. I still look back on it as an incredible life experience and to be involved with it, I just needed a bit of time to get over it."