Made of titanium and stainless steel. Width is adjustable.
Allergy Note: Stainless Steel, like brass, is an alloy. However, the materials that go into making stainless steel are some of the mildest your skin will ever feel. These include iron, carbon, and chromium. In some cases, some titanium may be added to increase strength. Some formulations can consist of nickel. However, the concentrations are too small to cause any problems for the wearer.