Wiley X's Blink model is part of its top selling Climate Control Series which incorporates a patented removable Facial Cavity™ Seal. This feature allows natural airflow while blocking out peripheral light to reduce eye fatigue. All this is designed to ensure a snug and comfortable fit whether you're cruising with the top down or going full throttle across the lake. In addition to the Facial Cavity Seal that keeps out light and wind, the Gravity features super tough Triloid nylon frames and the option of shatterproof 8-layer polarized lenses. Models: (Lense Tint/Frame Color) 553 - Clear/Matte Black 555 - Silver Flash/Aluminum Gloss 556 - (Light Adjusting) - Smoke Grey/Metallic Black 557 - (Polarized) - Bronze/Matte Black 558 - (Polarized) - Silver Flash/Aluminum Gloss Filter 8™ Polarized models cut glare to maximize vision in any condition. Light adjusting Lenses will lighten as conditions get darker, ensuring optimal optical clarity throughout the day! Features and Specifications: Includes: Leash cord, large black zippered case, cleaning cloth Patented removable Facial Cavity Seal seals out light and wind Virtually unbreakable Triloid nylon frames Certified ANSI Z87 (Occupational-grade eye safety) S-M Frame Fit