Native Eyewear Silencer Polarized Sunglasses Imported polycarbonate frame Interchangeable lens polarized 3" high 3" wide Single snap-back interchangeable lens system Rhyno-Tuff air frames are lightweight and comfortable enough to wear all day Anti-ocular intrusion system prevents your lenses from dangerously shooting toward your eyes in the event of an impact Optimal fit for medium profiles Mastoid temple grips rest comfortably behind your ears on the mastoid bone