Lightweight Metal Frame; Multi-Layer TAC Polarized Lenses; Eliminates 100% of UVA/UVB Harmful Blue Light and Glare; High Quality Metal Arms; Adjustable Nosepads for a Comfortable Secure Fit; Scratch and Impact Resistant. The Bertha Emilia includes the following features: lightweight metal frame, multi-layer TAC polarized lenses, eliminates 100% of UVA/UVB harmful blue light and glare, high quality metal arms, adjustable nosepads for a comfortable secure fit, scratch and impact resistant.