MASOP Most jewelry from MASOP are made of high quality Stainless Steel and geninue leather. Including rings, bracelets and necklace, MASOP jewelry has mens design and womens design. We keep on providing great quality jewelry at an affordable Price. Why choose Stainless Steel Jewelry. Stainless steel jewelry is very durable. Will not tarnish and rust. Anti-allergic and never fade. Now it is the most hypoallergenic element known to man and will not irritate even the most sensitive skin.