California Proposition 65:

WARNING:  The eyewear products in this store can expose you to the chemical Nickel (Metallic), which is known to the State of California to cause cancer, and Bisphenol A (BPA), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/product.

California Health & Safety Code Section 25249.6