Tifosi Duro Sunglasses Don't be fooled by the handsomeness of The Duro. These are no pretty boy sunglasses, as they are constructed from extremely tough Grilamid TR-90 homopolyamide nylon for high alternative bending strength and resistance to chemical and UV damage. Hydrophilic rubber and nose pieces prevent slippage so that your shades stay fixed to your face, keeping you from having to take your hands off of the handlebar. The adjustable nose piece lets you dial in the fit for optimal comfort. Your line of vision goes unhindered with the vented lenses which improve air circulation to prevent fogging. The Duro is built to handle the abuse of backwood trails, yet they look right at home cruising the city streets or seaside boardwalk. Frame Type: Full Frame Weight: 32 grams 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 Hydrophilic rubber adjustable ear and nose pieces for a no-slip fit Vented lenses improve air circulation and prevent fogging 100% UVA/UVB Protection Scratch resistant and shatter proof Polycarbonate Lens True Polarization material embedded Optically Decentered lenses eliminate distortion and prevent magnification Glare Guard prevents eye strain and fatigue Included Lenses: Smoke - Clarion Blue/AC Red/Clear, Neon Green- Smoke/AC Red/Clear, Gloss Black - Smoke/AC Red/Clear Includes bag and case Fit: Large and Medium size faces