Valley Boy is the merchandising brand of the Manic Street Preachers. They established it with their 1998 album This is my truth tell me yours and its tour.
They sell the usual stuff you can buy at a concert:T-shirts which you will never wear, cups and calendars.
The only special thing is that this is their own company and I guess they produce all the stuff political correct.

Valley boy is a reference to their Welsh home.