Upper gauntlet halfs ESB - Resin or vac formed?


I am building another pair of gauntlets for my ESB Boba costume. The last ones have been from MOW, all parts from resin. I try to get the new ones more accurate but couldnt find out if the upper halfs must be resin or vac formed. I know they have been upper halfs resin and the lower parts vac-formed in ROTJ and found a lot of nice pics. But what about the ESB set? From the pictures in the gallery I would say the upper parts are resin...
Hoping for some help!