Elvenweave (3.5e Equipment)
From D&D Wiki
Elvenweave: A special leather made by the elves, it is light and offers good protection. It is almost never seen being used by non-elves. Elvenweave functions as leather except that it can only be bought in elven lands, and they rarely sell it to non-elves. An elvenweave cuirass weighs 10 lbs. It has the same protection as leather but doesn't interfere with spellcasting. It costs 20 gp for elves and 35gp for non-elves.