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The Oakley HSTN A 9242A sunglasses bring a fresh perspective to round eyewear, blending heritage design cues with modern materials and lens technology. The "A" designation indicates a low bridge fit—engineered with a shallower nose bridge and adjusted temple geometry to sit properly on faces with lower nose bridges and higher cheekbones, eliminating the sliding and pressure points that plague standard-fit frames.
Design Rooted in Oakley Heritage
Introduced in 2021, the HSTN evolved from Oakley's collaboration with friends of the brand searching for the next evolution in lifestyle eyewear. The result is a gender-neutral frame with striking modernized circular lenses that cut off toward the nose—a shape reminiscent of the Oakley Clifden but sized for everyday wear. The modernized trigger stem is a direct nod to Oakley's original Razor Blade sunglasses from the late 1980s, connecting today's street style to the brand's performance roots.
The frame is constructed from BiO-Matter, Oakley's plant-based alternative to traditional O-Matter. Made from castor bean bio-resin with at least 56% bio-based carbon content, BiO-Matter delivers the same lightweight durability and all-day comfort as the original petroleum-based material while reducing environmental impact. Unobtainium nosepads increase grip as you sweat, keeping the frames secure during activity.
Prizm Lens Technology
Available in multiple Prizm lens options—including Prizm Tungsten, Prizm Ruby, Prizm Black, and polarized variants—the HSTN A uses Oakley's contrast-enhancement technology to fine-tune what you see. Prizm lenses work by blocking specific wavelengths of light while allowing others through, enhancing colors that matter and muting those that don't. The result is sharper detail recognition, reduced eye fatigue, and colors that pop without the artificial oversaturation of cheaper tints. All lenses block 100% of UVA, UVB, UVC, and harmful blue-violet light up to 400nm.
Prescription-Ready
The HSTN A is compatible with Oakley Authentic prescription lenses, making it a practical choice if you need vision correction. The 52mm round lens provides enough surface area for most prescriptions without the optical distortion that can plague smaller lifestyle frames.
Measurements: 52mm lens width, 21mm bridge width, 142mm temple length. The low bridge fit offers approximately 131mm frame width, designed for medium faces that need extra clearance at the nose and cheeks.
Product Details
Product DetailsModel
0OO9242AShape
Gender
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
BrownColor Code
924207Color Description
Dark Amber/light CurryLens Color
Prizm Tungsten
Frame Color
BlackColor Code
924206Color Description
Matte CarbonLens Color
Prizm Tungsten
Frame Color
BlackColor Code
924202Color Description
Matte CarbonLens Color
Prizm Ruby
Frame Color
BlackColor Code
924205Color Description
Matte BlackLens Color
Prizm Black Polarized
Frame Color
BlackColor Code
924204Color Description
Matte BlackLens Color
Prizm Sapphire Polarized
Color Code
924203Color Description
Olive InkLens Color
Prizm Tungsten Polarized
Frame Color
BlackColor Code
924201Color Description
Matte BlackLens Color
Prizm Black
Frame Color
BlackColor Code
924208Color Description
Matte BlackLens Color
Prizm Ruby
Frame Color
BlackColor Code
924209Color Description
Dark GalaxyLens Color
Prizm BlackLens Features
polarized
Frame Color
BlackColor Code
924210Color Description
Matte BlackLens Color
Prizm Black
Color Code
924212Color Description
Matte Transparent MistLens Color
Prizm Grey
Frame Color
BlackColor Code
924211Color Description
Matte Black/matte ClearLens Color
Prizm 24k
Color Code
924215Color Description
Matte BalsamLens Color
Prizm Snow Sapphire
Color Code
924216Color Description
CelesteLens Color
Prizm Ruby PolarizedLens Features
polarized
Frame Color
BlackColor Code
924219Color Description
Matte BlackLens Color
Prizm Grey
Color Code
924217Color Description
ClearLens Color
Prizm Violet
Frame Color
TortoiseColor Code
924218Color Description
Matte TortoiseLens Color
Prizm Black
Size Details
Size DetailsBridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Bridge Width
21.00Temple Length
142.00Size
5221-142
Excellent product and service!
Bought these for my boyfriend for Christmas and he’s obsessed with them!
Oakley Hstn A 9242A Sunglasses
New favorite sunglasses!
They look exactly like Oakley lenses at a fraction of cost although Oakley not printed on them. Easy to replace and live the look.
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Frequently Asked Questions
What does the 'A' mean in Oakley HSTN A 9242A?
The 'A' designation indicates a low bridge fit (also called Asian fit). This version features a shallower nose bridge, adjusted nose pad positioning, and modified temple angles designed for faces with lower nose bridges and higher cheekbones. It prevents the frames from sitting too close to your face or sliding down your nose—common issues with standard-fit sunglasses on certain face shapes.
Can I get prescription lenses in the Oakley HSTN A?
Yes, the Oakley HSTN A 9242A is prescription-ready and compatible with Oakley Authentic prescription lenses. The 52mm round lens size accommodates most prescription ranges. You can order prescription lenses directly through authorized Oakley retailers or have your optician fit custom lenses to the frame.
What is BiO-Matter and how does it compare to regular O-Matter?
BiO-Matter is Oakley's plant-based frame material made from castor bean bio-resin with at least 56% bio-based carbon content (the ratio of castor oil to fossil sources). It offers the same lightweight durability, flexibility, and all-day comfort as traditional O-Matter but with a reduced environmental footprint. Early customer reviews show no difference in performance or longevity compared to petroleum-based frames.
How do Prizm lenses work in the HSTN A sunglasses?
Prizm lenses use spectral tuning to selectively filter specific wavelengths of light, enhancing colors that provide important visual cues while muting distracting hues. This increases contrast and detail recognition without simply darkening your view. Each Prizm variant (Tungsten, Ruby, Black, Sapphire) is tuned for different lighting conditions, and all block 100% of UVA, UVB, UVC, and harmful blue-violet light up to 400nm.
What face shapes work best with the Oakley HSTN A?
The HSTN A's round lens shape works best on square and oval faces, where the curved lines soften angular features. The low bridge fit is specifically designed for faces with lower nose bridges and higher cheekbones. The frame is marketed as gender-neutral and sized as a medium fit (52mm lens width, 131mm total frame width), though some reviewers note the lenses run slightly small for larger heads.
Are the lenses replaceable on the Oakley HSTN A?
Yes, the HSTN A features replaceable lenses like most modern Oakley frames. However, Oakley does not sell official replacement lenses for this lifestyle model directly. You can purchase aftermarket replacement lenses from several online retailers that specialize in Oakley lens replacements, or have prescription lenses fitted by an authorized optical provider.
Compare With Similar Frames
How the Oakley Hstn A 9242A Sunglasses stacks up against the closest alternatives we carry.
- Iconic square Wayfarer-inspired shape with broader appeal and proven track record since 2010
- Larger lens coverage (55mm vs 52mm) for bigger faces and more sun protection
- Wider range of colorways and special editions available
- Rounded square shape offers versatility—works on more face shapes than pure round or square
- Lower starting price ($114.67) makes it the most affordable option
- Slightly larger 54mm lens for more coverage
Read the full comparison
Oakley HSTN A vs. Holbrook vs. Sylas: Which Lifestyle Frame Is Right for You?
Choosing between Oakley's lifestyle sunglasses comes down to face shape, fit needs, and style preference. Here's how the HSTN A stacks up against two popular alternatives in our catalog.
HSTN A 9242A: Modern Round with Low Bridge Fit
The HSTN A is the choice if you need a low bridge fit or want the most modern, design-forward look. Its round lenses and trigger stem pay homage to Oakley's Razor Blade heritage while the BiO-Matter frame reflects current sustainability priorities. At 52mm, the lenses run slightly smaller than the Holbrook or Sylas, making this best for medium faces. The low bridge fit is the key differentiator—if standard frames slide down your nose or sit on your cheeks, the HSTN A solves that problem. Price: $138.07–$249.00.
Holbrook 9244: The Proven Classic
The Holbrook is Oakley's answer to the Wayfarer—a square frame that's been a bestseller since 2010. It offers broader appeal with its timeless shape, larger 55mm lenses, and dozens of colorway options. The Holbrook works on most face shapes and provides more coverage than the HSTN, but it only comes in standard fit. If you have a lower nose bridge, the Holbrook will likely sit too close to your face. It's also slightly heavier and uses traditional O-Matter instead of the HSTN's eco-friendly BiO-Matter. Price: $124.50–$248.00.
Sylas 9448: The Middle Ground
The Sylas splits the difference with a rounded square shape—less aggressive than the Holbrook's hard angles, less bold than the HSTN's full circles. It's the most affordable option at $114.67 and offers a 54mm lens for solid coverage. However, it lacks the distinctive design story of both competitors and only comes in standard fit. The Sylas is a safe, versatile choice if you want a modern Oakley frame without committing to a strong shape statement. Price: $114.67–$213.00.
Our Recommendation
Choose the HSTN A if you need low bridge fit, want sustainable BiO-Matter construction, or prefer a modern round aesthetic with heritage details. Choose the Holbrook if you want the most proven design with maximum lens coverage and don't need low bridge fit. Choose the Sylas if you're budget-conscious and want a shape that works on nearly any face without making a bold statement.
At a Glance
Oakley Holbrook 9244 Sunglasses
Pros:
- Iconic square Wayfarer-inspired shape with broader appeal and proven track record since 2010
- Larger lens coverage (55mm vs 52mm) for bigger faces and more sun protection
- Wider range of colorways and special editions available
- Slightly lower starting price point ($124.50 vs $138.07)
Cons:
- Standard fit only—no low bridge option for faces that need it
- Traditional O-Matter frame material instead of sustainable BiO-Matter
- Square shape can look boxy on round or oval faces
- Heavier, more substantial feel compared to the HSTN's lighter construction
Oakley Sylas 9448 Sunglasses
Pros:
- Rounded square shape offers versatility—works on more face shapes than pure round or square
- Lower starting price ($114.67) makes it the most affordable option
- Slightly larger 54mm lens for more coverage
- Available with Prizm and polarized lens options
Cons:
- Less distinctive design—doesn't have the heritage story of the Holbrook or the modern edge of the HSTN
- Standard fit only—no low bridge variant
- Traditional O-Matter instead of eco-friendly BiO-Matter
- Lacks the trigger stem detail and design heritage that make the HSTN unique