"Tifosi Hagen Men's Sunglasses The Tifosi Hagen Men's Sunglasses are made of Grilamid TR-90, a homopolyamide nylon characterized by an extremely high alternative bending strength, low density, and high resistance to chemical and UV damage. Tifosi Optics Interchangeable sunglasses feature decentered shatterproof polycarbonate lenses to virtually eliminate distortion, give sharp peripheral vision, and offer 100% protection from harmful UVA/UVB rays, bugs, rocks, or whatever comes your way. Lens installation/removal is fast and easy. Features: Full frame Weight: 24g DirectFitT Rx compatibility UVA/UVB Protection Polycarbonate lens True Polarization Vented lens Optically decentered Glare guard Bag and case included"