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Product details

Description

Inspired by the United States Bullion Depository in Fort Knox, Kentucky, these high quality, form-fitting sunglasses make for a comfortable and flexible fit. Best on larger head shapes, the Matte Black Fort Knocks Rx offer a timeless silhouette—perfect for your next pair of prescription sunglasses.

  • Matte black frames
  • Gold hardware
  • Spring hinges
  • Single vision or progressive
  • Lenses available in a variety of colors
  • All sunglasses lenses are polarized
  • Digital lens technology offers sharper image quality and enhanced contrast
  • Correction available in -6 to +3*
  • Astigmatism correction available to -4.00
  • Pupillary distance available in 57-80mm**
  • Scratch resistant coating
  • Anti-reflective coating
  • FDA compliant impact-resistant polycarbonate lenses
  • UV400 protection
  • Lightweight
  • Unisex
  • Hard shell case and microfiber pouch included
  • Prescription eyewear is available for U.S. customers only


*Correction available may vary per prescription and frame style selection. Our technicians will verify your eligibility before your order goes to production and will contact you with any issues.
**Some PD restrictions may apply on specific frames. A large disparity between customer PD and frame PD will increase thickness of final product.

Frame & Lens Info

Frame Shape: Fort Knocks

Frame Color: Matte Black

Lens Tech: Prescription

Lens Color:

Product Dimensions

Recommended Face Size: Medium to Large

Frame Height: 49 mm

Frame Width: 148 mm

Lens Width: 54 mm

Nose Bridge Width: 21 mm

Temple Length: 139 mm

Shipping & Returns

We ship Monday to Friday from our warehouse here in San Diego, CA, with the exception of holidays. For most standard orders, shipping takes about 5-7 business days depending on your selected carrier method at checkout (please allow up to 12 days for custom shades). Get your order sooner with our priority mail, 2nd day air, or overnight domestic shipping options. Once your order has been handed off to the carrier, you’ll receive a shipping confirmation email with your tracking information.


We also offer easy, free returns within 30 days of purchase for most products, with the exception of Custom Shop, Limited Editions, promotional items, and international orders. Check out our Help Center’s FAQ on returns for more information.


Questions? Shoot an email to support@knockaround.com, and we’ll get back to you ASAP!

Sustainability

In 2022, Knockaroud officially became Plastic Neutral—for every pound of plastic we use, we remove one pound from the environment elsewhere. But that’s far from where our sustainability efforts end. We’ve also implemented minimalist, recycled packaging, eliminated single-use plastics, and included recycled materials in our products whenever possible. There’s always more progress to be made, but we’re committed to putting in the work.

Man and woman at the beach wearing Knockaround sunglasses

Who we are

Sun and San Diego

Born, raised, and bathed in San Diego sunshine, Knockaround is the original, affordable sunglasses brand. Since 2005 we’ve committed to making durable shades that are both practical and stylish. Our stellar customer service and ever-growing selection of high-quality eyewear have made us not just hometown favorites, but go-to’s across the globe!

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4ocean plastic neutral commitment

Committed to Sustainability

Knockaround is Plastic Neutral

Making high-quality shades is the core of what we do, but inevitably that means we contribute to excess plastic byproduct. The idea of being a net drain on the environment doesn’t sit well with us, so we partnered with 4ocean to maintain plastic neutrality and work further to improve the environmental friendliness of our process.

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average rating 4.9 out of 5
Based on 7 reviews
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100% of reviewers would recommend this product to a friend
Review posted
Reviewed by Efren C., from United States
Verified Buyer
Rated 5 out of 5

Fort Knox 👍🏽👍🏽👍🏽

Awesome glasses!!! 😎

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Reviewed by Jacob P., from United States
Verified Buyer
Rated 5 out of 5

great sunglasses choice

Wear Rayban's regularly but wanted a pair I could feel more comfortable with in any condition. These glasses exceeded all expectations and seem to be great quality. Polarized lenses, matte black finish and solid built frames for a budget friendly price point. I'll be getting another pair in the future

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Reviewed by Domenic S., from United States
Verified Buyer
Rated 5 out of 5

👍🏼

Great Quality. Would definitely recommend

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Reviewed by Anthony m., from United States
Verified Buyer
Rated 5 out of 5

Very happy with these glasses.

Very happy with these glasses. Well worth the money!

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Reviewed by Mark L., from United States
Verified Buyer
Rated 5 out of 5

Nice glasses

Nice prescription glasses for the money. I didn't get the anti glare and that was a mistake on my part. Otherwise, they're cool.

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Reviewed by Fred F., from United States
Verified Buyer
Rated 5 out of 5

Prescription for Cool

I’ve purchased several pairs of Knocks but until recently did not have a pair for myself. With the new RX service I was able to buy a pair of Matte Black Fort Knocks in my optical prescription.I couldn’t be more pleased with my new Knocks. There was a minor hiccup with the order but Customer Service corrected the issue in short order. Great service, excellent product.

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Reviewed by Dan K., from United States
Verified Buyer
Rated 4 out of 5

One of my favorite pairs of glasses

The only comaint I have is that they took a long time to get to me. I was told the had shipped but for over a week the tracking number didn't even register that USPS had the package yet. The customer service was great at keeping me updated with this issue though.

And as always, these knocks are always on my person

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