大象传媒

Chelsea have joined the big boys with a new sponsorship deal with Nike

It's worth 拢60m a season for a whopping 15 years.

But the kit only costs a couple of pounds ($3-4) to make.

Sports Science professor Simon Chadwick from the University of Salford in the UK tells Outside Source's Rick Kelsey how a kit deal affects fans.

(Photo: Chelsea players Credit: Getty Images)