Dual X12 Sunglasses Fit: Medium to Large 8 base lens curvature for optimum wrap-around fit Adjustable non-slip rubber nose piece Impact, chemical, and UV damage resistant Grilamid TR-90 frames Shatterproof and scratch-resistant polycarbonate lenses 100% UVA, UVB, UVC Protection Optimized Magnification Zone (OMZ) reduces distortion and fatigue Available in +1.5, +2.0, or +2.5 spot diopters Weight: 1 oz (30 grams)