Costa's Tuna Alley reading 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 in 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 polycarbonate Green mirror lenses provide improved vision and contrast for freshwater fishing. 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