West Ham have confirmed Umbro will produce their kit from next season onwards after signing a five-year deal with the sportswear manufacturer.
Adidas currently produce all of the Hammers' official kits but the change will take place ahead of the club's final season at Upton Park before their move to the Olympic Stadium for the 2016/17 campaign.
West Ham vice-chairman Karren Brady was pleased to seal a new partnership, explaining:
As we approach two historic seasons for West Ham United, we are delighted once again to team up with Umbro.
(They are) a company which - like West Ham - is steeped in the heritage of English football but also a fast-growing global brand with an exciting future ahead.
It is especially fitting that - during our final season at the Boleyn Ground - our players and fans will wear a brand synonymous with one of the finest moments in West Ham's rich history: England's 1966 World Cup triumph.
West Ham manager Sam Allardyce has defended Leicester counterpart Nigel Pearson after he was branded a bully for a bizarre press conference in which he labelled a journalist "an ostrich".
Allardyce, speaking at his press conference ahead of West Ham's game against Burnley on Saturday, leapt to the defence of his fellow manager and hit out at the furore created around this latest incident.
When you are down there dealing with the pressures that come upon in terms of staying in the Premier League, I think it is a huge pressure for everybody to continue to work under that situation and come through it.
What surprises me is this condescending attitude about what should happen to Nigel that I have been hearing about this morning. People have been talking about bullying and stuff like that - what a load of rubbish. It's an outburst. Simple as that, plain and simple.
But I listen to the world of the media and sometimes it really does baffle me what they come out with in terms of what he should or shouldn't be doing.
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Sam Allardyce has told Aaron Cresswell he would be better served staying put at West Ham next season even if he is wanted by Premier League heavyweights Manchester City and Chelsea.
The 25-year-old has been an ever-present in the league so far this season, his first at Upton Park following a summer move from Ipswich.
Having twice been named in the Championship team of the year Cresswell has continued to impress in the top flight and has reportedly caught the attention of some of the league's biggest sides, with City and Chelsea both believed to have taken a look at the former Tranmere man.
Asked if Cresswell would be better off staying at Upton Park, the Hammers boss said: "There's no doubt about that because he's year one in the Premier League.
"Year one is an ongoing experience that you have that you know the level. Aaron now needs to grow from that experience. His challenge is to continue to work even harder than he has this year, not to rest on his laurels.
"We have seen players do that and then year two is more of a disaster than his impressive first year. His professionalism will come into play at the start of next year by where he gets and if he gets to the next level."
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