Sunderland defender Titus Bramble says former Manchester United duo John O'Shea and Wes Brown have lifted the culture at the club.
Bramble believes the defensive pair have made a huge impression on Wearside.
"You can feel it around the club - they're just winners, aren't they?" said Bramble.
"They've got a winning mentality constantly. They're just used to winning. They've brought that into the squad - for them, it's just about winning.
"It's great to have around. They've been playing with the best players in the world and all that just rubs off. It's little comments they make, little things they do.
"They've just got experience. When they're fully fit they've got everything. They're no-nonsense. They're defenders first and foremost, which is just great."