mmh i dont know.. i have white RST gloves and had them for a while now.. they still white (including the leather) and not cream as yours look. to me they also look as if "they have been around a bit" - as in laying on a shelf for the last 5 years.
if i received those as white gloves... i'd be sending them back .. cos white is white and cream is cream and black is black and u get the picture
