Take on any challenge with Knockout: a nearly-indestructible sport frame that stays comfortable and secure no matter how intense your activity. Quality double-injected Grilamid and rubber offers a flexible fit that feels tailored to your head size and lets you tackle your day without slippage. Premium polarized lenses and wide temples block harmful sun rays, while the close fit is designed to keep the elements out and your view clear.
Polarized sunglasses are one of the most useful accessories you can have in your arsenal. They're not just a fashion statement—they're functional, too.
Polarized sunglasses are designed to block out horizontally polarized light while allowing vertically polarized light to pass through. This reduces glare and improves clarity, contrast, and color perception. Polarized lenses are particularly helpful in bright sunlight and on cloudy days when there is a lot of scattered light.
By blocking the reflection from flat surfaces like water, snow, and pavement, polarized sunglasses can be particularly useful during outdoor activities like fishing, boating, or driving. They can also help reduce eye strain for people who spend time outdoors in bright conditions.
However, it is important to note that polarized lenses can also make it difficult to see LCD displays like those found on some smartphones, dashboards, or ATMs. They can distort vision when looking through tempered glass by making strange patterns appear. They may also not be suitable for certain activities where it is important to see glare as a warning sign, like downhill skiing or motorcycling, or when glare is a helpful component of a sport, like being able to judge slopes and grading on golf greens.
It is important to consider the specific activities you will be doing when deciding whether or not polarized sunglasses are right for you!
Every pair of Cliff Weil eyewear provides 100% protection against harmful UV-A and UV-B rays, up to 400 nanometers.
We are committed to quality in every pair of sunglasses we make. If you experience a problem with any of our products that is the result of a defect in materials and workmanship, we will replace it at no charge. Not sure? Contact our impeccable customer service team and we'll help you out.
Complete details of our lifetime warranty against manufacturer defects can be found here.
Always store your eyewear in a case or microfiber pouch to prevent damage to the lenses and frames. Because heat can cause your eyewear to warp and become distorted, never leave your sunglasses directly in the sun, and avoid leaving them in the car on hot days, especially on the dashboard.
Use a soft microfiber cleaning cloth to wipe away dirt, fingerprints and smudges from lenses and frames. For stubborn, stuck-on grime, use warm water, with a gentle soap only if needed, and gently rub away the dirt with your fingertips. Pat dry immediately. Avoid paper towels, tissues, chemical cleaners, and detergents, as these may be abrasive and scratch away protective lens coatings or strip frame paints and sealants.
Chemicals in sunscreens and insect repellants can damage eyewear, especially paints and coatings, so use care when applying these products to avoid contact. Since this isn't always realistic, be sure to clean your eyewear with a quality lens cleaner to remove any chemicals after using such products.
Hinge screws can loosen with use, so periodically check for loose screws and tighten as necessary, but don't overtighten.
Take care when using adhesives to repair broken frames or lenses. Many adhesives will melt and distort plastics and can "fog" lenses. Before repairing eyewear on your own, consult a professional or find out if your product is covered under our Lifetime Warranty.