Adorable and cute, these semi-rimless vintage inspired heart shaped sunglasses are sure to bring the funky. Stay fun and flirty all festival long in these hippie heart sunnies! This item features metal hinges and underwire; plastic upper frame and polycarbonate 100% UV high impact-resistant protected lenses. SPECS: USA:ANSI Z80.3 EU: CE Certified AU: Category 3; 8-17% VLT Drop Ball Certified: Military Standard FDA Registration Number: 3013407178 Ultraviolet Light (UV) Protection - UV 400 both UVA and UVB radiation. Blocking light rays as small as 400 nanometers. This means that anywhere from 99 to 100 percent of the sun's harmful radiation is kept away from the eyes. Visible Light Transmission (VLT) - This measures how much light your sunglass lens lets through. VLT of 1% means very dark lenses and a VLT of 100% means very light lenses.