KastKing Bifocal Polarized Sunglasses Matte Black Frame, Blue Mirror, Bifocal+2.0 — Polarized PC Lenses, Grilamid Frame

KastKing Estero Bifocal Polarized Sunglasses combine built-in reading magnification with polarized, impact-resistant PC lenses and a lightweight Grilamid frame for clear vision on water and in everyday life.

These sunglasses pair integrated bifocal magnifiers with full polarization and an oleophobic coating to reduce glare, repel oils, and resist scratches. Designed for outdoor use, the Estero line uses durable Grilamid frame material and polarized polycarbonate lenses to deliver UV protection, comfort, and stability during active pursuits. Available with reading powers of 1.5, 2.0, and 2.5, the Estero is built to help you see close details without swapping glasses.

How do these sunglasses improve near vision without separate readers?

The Estero has flush-mounted bifocal magnifiers built inside the polarized PC lenses so you can read maps, check your phone, or tie a hook without switching eyewear. Magnification zones are positioned for natural downward glances and maintain a clear peripheral view for safety and comfort.

• Integrated 1.5x, 2.0x, or 2.5x magnifiers embedded in the lenses
• 1.8mm thick bifocal insert for subtle, unobtrusive magnification
• Downward placement preserves straight-ahead and peripheral vision

Will these lenses reduce glare and protect against UV rays?

Yes — the Estero lenses are polarized to cut reflective glare from water, pavement, and other surfaces, improving contrast and clarity. They also block 100% of UVA and UVB radiation and meet or exceed U.S. ANSI standards for eye protection.

• Polarized polycarbonate (PC) lenses for glare reduction
• 100% UVA/UVB blockage meeting ANSI safety benchmarks
• Lens color options (smoke, brown) tailored for different light conditions

How durable and comfortable are the frames for active use?

The frames are molded from Grilamid, a flexible, heat- and UV-resistant material used in demanding applications. Lightweight and resilient, they hold their shape during activity while the tacky nose and temple pads help keep the glasses in place when you move.

• Grilamid construction: flexible, lightweight, and resistant to heat and UV
• Non-slip nose and temple pads for secure fit during motion
• Angular wrap design for full coverage and increased visibility

How should I care for these lenses and what comes with the sunglasses?

The Estero sunglasses include a molded hard case and a Prym1 Camo microfiber pouch for storage and cleaning. The oleophobic coating resists oils and dirt, but gentle cleaning with fresh water and a microfiber cloth is recommended to preserve the coating and avoid scratches.

• Molded custom hard case for impact protection in storage
• Prym1 Camo microfiber pouch doubles as a cleaning cloth
• Avoid soaking in saltwater; use fresh warm water and lint-free cloths for cleaning

Who is this for? The KastKing Estero Bifocal Polarized Sunglasses are designed for anglers, boaters, and outdoor enthusiasts who need both sun protection and convenient near-vision magnification. They’re also a practical choice for drivers, cyclists, and anyone who prefers one durable pair of sunglasses for both distance viewing and quick close-up tasks. If you want polarized glare reduction, UV safety, and built-in reading power in a single, rugged frame, the Estero is tailored to those needs without compromising comfort or coverage.