Costa Del Mar Tailfin sunglasses, Matte Black/Grey Polarized 580p, 60 Millimeters XL frame, 100% UV protection

The Tailfin combines a classic rectangular silhouette with Costa's high-performance 580 Polycarbonate lenses and a bio-resin frame for a reliable everyday sunglass. These 60 mm lenses sit in an XL frame (137 mm hinge-to-hinge) that’s engineered to hold its shape in heat or cold while resisting corrosion from outdoor use. Each pair ships with a protective case and microfiber cleaning cloth and is covered under manufacturer warranties when purchased through an authorized seller.

How do the Tailfin lenses perform on water and bright days?

The 580P grey polarized lenses cut glare and improve visual comfort without significantly shifting color perception, making them versatile for both marine environments and city streets. Polarization reduces reflected light, while the polycarbonate substrate balances toughness with optical clarity.

• 580 Polycarbonate material for impact resistance and light weight
• Grey polarization for neutral color transmission and reduced glare
• 100% UV protection to shield eyes from UVA and UVB
• Polarizing efficiency tuned for water and reflective surfaces

What does the frame construction offer for durability and fit?

Tailfin frames are made from Costa’s bio-resin nylon blended with corrosion-resistant metals at key points for long-term stability. The trifusion frame technology delivers distinctive color depth and keeps temples and hinges secure during active wear. The XL sizing accommodates wider faces and provides extra coverage.

• Bio-resin nylon resists warping in hot or cold conditions
• Corrosion-resistant metal components at the hinges for longevity
• 137 mm hinge-to-hinge measurement suited for wide faces
• Matte black finish for understated, low-glare styling

What accessories and care come with the Tailfin sunglasses?

Each pair arrives with a Costa-branded protective case and a microfiber cleaning cloth to help preserve lens coatings and frame finish. Following simple cleaning and storage steps keeps the polarization and optical clarity performing at their best.

• Included hard or soft case protects lenses in a bag or boat locker
• Microfiber cloth for scratch-free cleaning and maintenance
• Manufacturer warranty applies when purchased from authorized retailers
• Lightweight design reduces pressure for all-day wearability

Who is this for: The Tailfin in matte black with 580P grey polarized lenses is ideal for outdoorspeople who want a clean, rectangular style that works equally well on the water or around town. It suits wide faces, users who need durable impact-resistant lenses, and anyone seeking neutral-tone polarization with reliable UV protection. If you value a rugged-yet-refined frame, simple maintenance, and the reassurance of an authorized-warranty purchase, the Tailfin is a practical everyday sunglass choice.