Whether you\'re half way up the mountain or jogging on the beach, these sporty shades are perfect for any active pursuit. Bloc Titan Sunglasses boast XTR Karbon8 grey polarised lenses, which are distortion free, impact resistant and offer excellent protection in bright conditions. The KARBON TX bi-core injected frame is lightweight, durable and flexible with hypoallergenic nose pads and temple tips.XTR Karbon8 lenses - Maximum UVA and UVB protection, distortion free and impact resistant. Suited to bright conditions.KARBON TX bi-core injected frames - Flexible, lightweight, durable and comfortable.Sports hinges - Designed for strength and a secure fit, ideal for active pursuits.Hypoallergenic nose pads and non-slip temple tips - Designed for comfort and a secure fit.Hypoallergenic temple tip - Lightweight for improved comfort.Quick change lens system