The Costa Tuna Alley reader sunglasses, equipped with the patented C - Mate technology, offer the perfect balance between performance and practicality. Whether you are spotting a fish, tying a hook or reading a map, these glasses are with you for all your activities. Their design with no visible dividing line in the bifocal zone ensures optimal visual comfort throughout the day, whether casting lures or exploring a new area.The Blue mirror polycarbonate lenses are perfect for very bright conditions: sea, large lakes. Want to make sure you choose the right lenses? Find our guide by clicking hereFrame size: XL1. Frame width: 138mm2. Bridge width: 11mm3. Lens width: 61.5mm4. Lens height: 41.8mm5. Temple length: 125mm