Many people have allergies to the nickel found in most common jewelry metals. However, stainless steel does not incorporate other alloys to make it harder- it is a naturally hard metal. In fact, stainless steel is one of the most bio-compatible metals. It can be worn by anybody because of its anti-allergic properties.
Stainless steel jewelry can be cleaned with warm water and a clean cloth, forgoing the need to use harmful, expensive jewelry cleaners.