Checked the main books, AEG, and OA - couldn't find any refrence to Padded Leather. Sorry, no luck.
Talk to the player, and ask where the info for it can be found. If he can't find it either just ask: is it more like a soft leather outer layer with padding underneath like a leather jacket or motorcycle suit, or is it more of stiff leather plates sewn onto underpadding?
If it's the first, use padded stats, if it's the second, use leather armor stats.
*shrug*