i guessed these were supportes ones but thought the first one looked like a players jersey, will be interesting to see
edit: that link shows a singlet in the same design so looks like your right re it just being a training top, i guess we're all just too use to the nike "t-shirt jerseys" to recognise a t-shirt anymore!
the one labled with all blues would make a good jersey on its own, all it needs is the coloured badge