The Titan XR630 Sunglasses from BLOC are engineered for sports performance. Complete UVA and UVB protective lenses are housed in a lightweight and comfortable frame. The Titan XR630 Sunglasses benefit from the quick change lens system, so the glasses can be tailored to any activity.Performance sports sunglasses from BLOCXTR Karbon8 grey polarised lenses - maximum UVA and UVB protection, distortion free and impact resistant. Suited to bright conditionsKARBON TX bi-core frames - flexible, durable and lightweight, designed for greater comfortSports hinges - increased strength and performanceHypoallergenic nosepads Hypoallergenic lightweight temple tipsQuick change lens systemRecommended activity - walking / active / travel