Derby Category 3 Sunglasses

The Bloc Derby XDR10 sunglasses are a high-coverage wraparound sports sunglass built for active use in bright conditions. The red mirror Cat 3 lenses reduce glare and enhance contrast in strong sunlight, the lightweight frame sits securely on the face during movement, and the XTR Karbon8 optical class 1 lenses deliver distortion-free, impact-resistant performance — tested to BS EN ISO 12312-1:2022 standards with maximum UVA and UVB protection.

• Red mirror Cat 3 lenses — Cat 3 is the appropriate lens category for strong, direct sunlight; the red mirror coating reduces surface glare and enhances contrast in bright conditions, making them well suited to cycling, running, hiking, and watersports in high-UV environments.
• XTR Karbon8 optical class 1 lenses — Bloc's impact-resistant, distortion-free lens material tested to optical class 1 — the highest optical precision standard — ensuring clear, undistorted vision across the full lens surface without the edge distortion common in lower-specification sport lenses.
• Wraparound sports frame design — the curved wraparound construction maximises side and peripheral coverage, reducing light intrusion from the sides and protecting eyes from wind, dust, and debris during sport.
• Secure fit temples — the temple design holds the frame stable during movement and sport activity, preventing the glasses from shifting on the face during running, cycling, or high-output activity.
• Lightweight, durable construction — built for all-day comfort during active use without adding unnecessary weight or pressure to the nose and temples.
• Maximum UVA and UVB protection — full UV400 protection blocks 100% of UVA and UVB radiation up to 400nm.
• Tested to BS EN ISO 12312-1:2022 — independently tested and certified to the current British and European standard for sunglasses and sun glare filters for general use.