Your Cart is Empty

FX 21

Frame Color
Matte Black
Camo Green
Camo White

Enjoy a pair of sunglasses that have a light and flexible frame that fits almost any face shape. Protect your eyes from glares and UV rays with FX 21’s TAC polarized lenses perfect for outdoor activities.

Be sporty and fashionable at the same time, get your own FX 21 now!

  • 1 x FLUX FX 21 Sunglasses
  • 1 x Soft cleaning cloth
  • 1 x Protective Pouch
  • 1 x Hard box case
  • Product Features
    • ULTRA LIGHTWEIGHT AND DURABLE PC FRAME THAT FITS YOU. No need to look for the right frame to fit you. FX 21 is guaranteed to fit almost every facial shape there is. With its durable and flexible frame, you can wear it with ease anywhere you take it.
    • TAC POLARIZED SUNGLASSES FOR EXCELLENT CLARITY. Out on a hike or driving on a hot sunny day? Enjoy greater visibility and clarity by blocking harmful UV rays and glares. FX 21’s Tri-Acetate Cellulose polarized anti-glare lenses are scratch-resistant and will provide you the protection and clarity you need.
    • SUNGLASSES THAT KEEPS UP WITH YOUR ACTIVE LIFESTYLE. Looking for a women's sport sunglasses that stay with your every move? FX 21 has reinforced rubber grips on its tips that guarantee no slips or flinging every time you move.
    • DO WHAT YOU NEED TO DO WITHOUT GETTING DISTRACTED BY YOUR SUNGLASSES. You’ll want a pair of sports sunglasses for women that are comfortable and that will fit your face snugly so that you won’t have to adjust them all day long. With FX 21’s light and flexible frame, you can easily do your own thing.
    • COMES WITH A PROTECTIVE HARD BOX CASE. Take your FX 21 wherever your desires take you! These glasses with a durable hard box for easy and safe storage. Now you can take your high-performance sunglasses wherever you wander.
    • 30 DAY RETURNS / ONE YEAR QUALITY WARRANTY. At Flux, all our glasses come with a 30-Day Money Back Guarantee and a One-Year Quality Warranty. Tell us about your experience. Our customer team is on standby to help.
      • Package Dimensions: 7 x 3 x 2.5 inches
      • Shipping Weight: 0.3 lbs

      Proposition 65 warning for California residents




      After your payment is confirmed, your orders are shipped directly from Amazon warehouses within 24 hrs for your convenience and maximum efficiency. A confirmation will be sent to you via email with your Tracking Number as soon as the package is shipped.

      We are currently offering FREE Standard Shipping for all orders over $40!

      3 - 5 DAYS
      $ 5.95
      2 DAYS
      $ 7.90

      For questions regarding Returns, please check our Returns Policy page.

      We also have compiled common questions from from our past customers in our Frequently Asked Questions page.

      For any other concerns, you can reach out to us through email at customer_service@fluxsunglasses.com or through our Contact Us page.


      Leading an adventurous life is a brave choice—the last thing you need to worry about is losing one of the most essential weapons in your armory. FLUX Premium Sports Sunglasses has a NEVER LOSE IT GUARANTEE that gets this worry out of the way. We’ll give you a free replacement AND shipping if you lose your pair, that is, if you share your adventures with our sunglasses within 12 months of buying them.



      Does the listed lens height include the frame?

      Yes, the height specified includes the lens.

      What do the filter categories on sunglasses mean?

      Filter categories pertains to how light or dark the tint of the lens. It has five filter categories;

      1. Clear or very light
      2. Light
      3. Medium
      4. Dark
      5. Very dark

      The number is a reference to the tint of the lenses. It does not affect the UV filter or polarization. Categories 1 and 2 are better for low light conditions, i.e. morning and evening. Most sunglasses are category 3 and work well in full sunlight. Category 4 is not recommended for driving.

      Which lens color is the best?

      Lens color is a personal choice and doesn't affect how well sunglasses lenses protect your eyes from UV light. Gray and brown are popular because they distort color perception the least.

      Can sunglasses designed for specific sports really make a difference?

      Yes. Sportswear in general tends to be safer than regular sunglasses because the lenses and frames are made of special materials that are unlikely to shatter if struck and can give you the benefits of both sunglasses and protective eyewear.

      Also, certain lens colors in performance sunglasses can enhance your vision for certain sports; brown, for example, is popular with golfers because it provides nice contrast on those very green golf courses.

      How do polarized lenses work?

      When daylight strikes a non-metallic surface such as water it produces glare which can distract us and can cause temporary blindness. Polarizing lenses selectively filter out the horizontal light, thus eliminating glare.

      What are the key benefits of wearing polarized sunglasses?

      When daylight strikes a non-metallic surface such as water it produces glare which can distract us and can cause temporary blindness. Polarizing lenses selectively filter out the horizontal light, thus eliminating glare.

      Do darker sunglasses lenses provide more UV protection than lighter lens tints?

      Darker sunglasses decrease the amount of visible light that passes through the lenses compared with lighter lens tints, but they don't necessarily provide greater protection from UV rays (which are invisible).

      Flux Sunglasses are polarized sunglasses so you can be sure that your eyes are protected, secured and fashionable at the same time.

      Check them out in our shop page and start protecting your eyes against UV rays.

      Do these glasses float?

      No, Flux Sunglasses are not designed to float.

      Does it come with readers?

      Flux sunglasses does not come with readers and are polarized glasses only.

      Is there a way to tighten the fit of these glasses?

      No, There is no way to adjust the fit of the glasses. However, Flux sunglasses are almost one size fits most.

      You can check our THE RIGHT SUNGLASSES FOR YOU page and see which Flux Sunglasses fits best with your face shape.

      Are these sunglasses spring hinged?


      Do you have polarized glasses that fit over prescription glasses?

      Sorry, we don't have any fit over sunglasses.


      Do you have any warranty?

      Yes, we stand by our products' quality to the extent that we give 1 year replacement warranty that covers damages like popping out lenses, lenses discoloration, temple and/or frame delamination, and other known factory defects.


      I am unstatisfied with the product, can I return them?

      Absolutely! Your satisfaction is our priority.

      We offer 30 days hassle free returns If you are not satisfied with your purchase., Please contact us through email at customer_service@fluxsunglasses.com or through our Contact Us page and request a return within 30 days of receipt of the product. All products must be packed in the original, unmarked packaging including any accessories, manuals, documentation and registration that was included with the product. Returns that do not meet these conditions may be subject to a restocking fee.

      If 30 days have gone by since your purchase, unfortunately, we can’t offer you a refund or exchange.

      To complete your return, we require a receipt or proof of purchase.

      Please read our Returns Policy for more details.

      My Flux Sunglasses haven't arrived yet. What can I do?

      We are so sorry about this. Please tell us where you purchased the product.

      Please send a message through email at customer_service@fluxsunglasses.com or through our Contact Us page and we'll help you track your order.

      Certain circustances might affect delivery time sometimes such as bulk orders on special occasions like Christmas.