I have a wild nickel allergy. So I know absolutely for sure if anyone has it. For example, I was very excited when I got married and got a carbide ring. Well I wore it for an hour and boom I blew up like crazy. I found out that tungsten uses nickel as a binder. okay, right? That's what led me to this belt. After years of treating conventional belts with hockey tape or whatever, I decided to try a nickel free belt. a month and a half. Then I'm not exactly sure what happened. But the reaction to this is pretty wild. Huge blisters on the belt. metal exposing my skin. In any case, the belt itself is well made. But I can't imagine it not containing nickel through and through. So my search for a titanium belt buckle continues.