Both my friend and I have the Altura transformer top. The sleeve zip off, so it is a long and short sleeved top and like a lot of the others above, I don't take off the sleeve unless it is really warm. I also like the fact that the sleeves easily fold up into one of the 3 rear pockets (though now I am recumbent bound, that may not be as useful as before) but the top itself became my main cycling attire (coupled with some Assos early autumn 3/4 length leggings (which also come in a bib form)).