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The Oakley Enigma Mass 8191 eyeglasses combine athletic engineering with everyday wearability. This full-rim square frame features a mixed-material construction that balances durability with lightweight comfort.
Built from Oakley's Performance Materials
The front frame is constructed from O Matter, Oakley's proprietary stress-resistant nylon that's 25% lighter than acetate and twice as strong. It flexes under pressure instead of snapping, resists temperature extremes, and delivers all-day comfort without the weight. The temples are made from lightweight C-5 alloy—a five-metal blend that tapers from thick to thin, paying homage to Oakley's signature trigger stem design from their sport sunglasses heritage.
Unobtainium nosepads and earsocks provide the no-slip grip Oakley is known for. This hydrophilic rubber actually increases traction when you sweat, keeping the frames locked in place during movement. It's the same material trusted by athletes, now engineered into a lifestyle frame.
Prescription-Ready for Your Vision Needs
These frames are fully prescription-ready and compatible with single vision, progressive, and bifocal lenses. Add blue light filtering for screen time, photochromic lenses that adapt to changing light, or anti-reflective coatings for sharper vision. The square shape and generous lens height make them well-suited for progressive prescriptions, giving optical labs the vertical space they need.
Design and Fit Details
The Enigma Mass features a bold square shape with mixed-material construction that pairs the matte texture of O Matter with the metallic finish of C-5 alloy temples. Distinctive Oakley icons mark the temple tips.
Available in two sizes—55mm and 57mm lens width—to fit a range of face shapes. The unisex design works for anyone seeking sport-inspired eyewear with real substance behind the style.
Product Details
Product DetailsModel
0OX8191Shape
Gender
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsColor Code
819102Color Description
Satin Grey Smoke
Color Code
819102Color Description
Satin Grey Smoke
Frame Color
BlackColor Code
819103Color Description
Satin Black
Frame Color
BlackColor Code
819101Color Description
Satin Black
Frame Color
BlackColor Code
819103Color Description
Satin Black
Frame Color
BlackColor Code
819104Color Description
Matte Blue Steel
Frame Color
BlackColor Code
819104Color Description
Matte Blue Steel
Frame Color
BlackColor Code
819101Color Description
Satin Black
Color Code
819107Color Description
Matte Transparent Abyss
Frame Color
BrownColor Code
819106Color Description
Dark Amber
Color Code
819107Color Description
Matte Transparent Abyss
Frame Color
BrownColor Code
819106Color Description
Dark Amber
Frame Color
BrownColor Code
819109Color Description
Transparent Sand
Frame Color
BrownColor Code
819109Color Description
Transparent Sand
Color Code
819108Color Description
Mahogany
Color Code
819108Color Description
Mahogany
Size Details
Size DetailsBridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
Bridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
Bridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
Bridge Width
15.00Temple Length
141.00Size
5715-141
Bridge Width
15.00Temple Length
141.00Size
5515-141
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Frequently Asked Questions
Are the Oakley Enigma Mass 8191 eyeglasses prescription-ready?
Yes, the Enigma Mass 8191 frames are fully prescription-ready and compatible with single vision, progressive, and bifocal lenses. You can add Oakley Authentic Prescription Lenses with options including blue light filtering, photochromic (Transitions), anti-reflective coatings, and high-index materials for stronger prescriptions. The square shape and generous lens height make them particularly well-suited for progressive lenses.
What is O Matter frame material and why does Oakley use it?
O Matter is Oakley's proprietary stress-resistant nylon that's 25% lighter than traditional acetate and twice as strong. It's engineered to flex under pressure rather than snap, resists temperature extremes without becoming brittle, and provides all-day comfort for active lifestyles. The material was originally developed for sport sunglasses and is now used across Oakley's eyeglass frames for its durability and lightweight performance.
What are Unobtainium nosepads and earsocks?
Unobtainium is Oakley's proprietary hydrophilic rubber used on nosepads and temple earsocks. Unlike regular rubber, it becomes tackier when exposed to moisture—meaning the frames actually grip better when you sweat. This no-slip technology keeps the glasses securely in place during sports, workouts, or any active movement, which is why it's trusted by athletes and now integrated into lifestyle frames like the Enigma Mass.
What is the connection between Kylian Mbappé and the Enigma Mass?
The Oakley Enigma Mass is part of the Kylian Mbappé Signature Series, a collaboration between Oakley and the French football superstar. The frame's bold shape, mixed-material construction with metal stems, and warm color options express Mbappé's talent, confidence, and dynamic energy. Mbappé has partnered with Oakley since 2021, and this collection reflects his forward-focused mindset and style both on and off the pitch.
What sizes are available for the Oakley Enigma Mass 8191?
The Enigma Mass 8191 is available in two lens widths: 55mm and 57mm. Both sizes feature a 15mm bridge width and 141mm temple length. The square shape and full-rim design work well for medium to large faces, and the unisex styling makes them suitable for both men and women seeking a bold, sport-inspired look.
Can I use my FSA or HSA to purchase Oakley prescription eyeglasses?
Yes, prescription Oakley eyeglasses including the Enigma Mass 8191 qualify as FSA (Flexible Spending Account) and HSA (Health Savings Account) eligible expenses. When you add prescription lenses to the frames, the complete pair qualifies for reimbursement under most vision benefit plans, making them an excellent way to use your pre-tax healthcare dollars.
Compare With Similar Frames
How the Oakley Enigma Mass 8191 Eyeglasses stacks up against the closest alternatives we carry.
- Lower price point ($92–$187 vs $255–$276)
- Iconic, proven design with broad appeal
- More conservative styling for professional environments
- Slightly lower price range ($129–$276)
- More subtle, professional aesthetic
- Proven everyday frame with broad face compatibility
- Premium metal construction for refined aesthetic
- Similar price range ($217–$242)
- Lighter weight than O Matter
Read the full comparison
Oakley Enigma Mass 8191 vs. Similar Prescription Frames
Choosing between Oakley's prescription eyeglasses often comes down to how bold you want to go and whether you prioritize sport-inspired engineering or classic styling. Here's how the Enigma Mass 8191 compares to other popular square frames in our collection.
Enigma Mass 8191 vs. Holbrook Rx 8156
The Holbrook Rx 8156 is Oakley's most iconic lifestyle frame—a proven classic that's been a bestseller for years. Both frames share O Matter construction and square shapes, but the Enigma Mass takes a more contemporary, architectural approach with its C-5 alloy temples and trigger stem-inspired design. The Holbrook Rx starts at $92, making it significantly more affordable, and its conservative styling works in any environment. However, if you want something more distinctive that stands out and incorporates premium metal accents, the Enigma Mass delivers that statement-making presence. The Enigma Mass also offers better progressive lens compatibility thanks to its larger lens height, and it's part of the Kylian Mbappé signature collection for those who value the athlete connection.
Enigma Mass 8191 vs. Pitchman 8050
The Pitchman 8050 is another square O Matter frame that sits in a similar price range ($129–$276), but it takes a more understated approach to design. The Pitchman's all-plastic construction and subtle styling make it the safer choice for conservative professional environments where you don't want your eyewear to be the focal point. The Enigma Mass, by contrast, is designed to grab attention—the mixed-material construction with metal temples, bold shape, and signature athlete story make it the choice for those who see eyewear as an expression of personality and performance. If you want versatile everyday glasses that blend in, go Pitchman. If you want sport-inspired eyewear with real presence, the Enigma Mass is your frame.
Enigma Mass 8191 vs. Chamfer Squared 8143
The Chamfer Squared 8143 offers a metal alternative at a similar price point ($217–$242). If you prefer the refined look and lighter weight of metal frames over sport-inspired plastic, the Chamfer Squared delivers that traditional eyeglass aesthetic. However, metal lacks the impact resistance and grip technology that make the Enigma Mass ideal for active lifestyles. The Enigma Mass's O Matter front and Unobtainium nosepads mean it stays put during movement and can handle the occasional drop or bump that would bend metal frames. The Chamfer Squared is the better choice for business-casual environments where you want understated sophistication; the Enigma Mass is the better choice when you want performance engineering and bold, contemporary styling.
Why Choose the Enigma Mass 8191?
The Enigma Mass 8191 is the right choice if you want eyeglasses that combine Oakley's sport heritage with lifestyle versatility. The mixed-material construction, Unobtainium grip technology, and connection to Kylian Mbappé's signature collection make it more than just another square frame—it's a statement about performance, confidence, and forward-thinking design. At $255–$276, you're paying for proprietary materials, athlete-inspired design, and engineering that goes beyond what typical fashion frames offer. If you value substance behind the style and want eyewear that can keep up with an active life, the Enigma Mass delivers.
At a Glance
Oakley Holbrook Rx 8156 Eyeglasses
Pros:
- Lower price point ($92–$187 vs $255–$276)
- Iconic, proven design with broad appeal
- More conservative styling for professional environments
- Widely recognized Oakley classic
Cons:
- Less distinctive—very common frame
- Standard O Matter temples (no C-5 metal accents)
- Smaller lens height may limit progressive lens performance
- Not part of a signature athlete collection
Oakley Pitchman 8050 Eyeglasses
Pros:
- Slightly lower price range ($129–$276)
- More subtle, professional aesthetic
- Proven everyday frame with broad face compatibility
- Lighter visual weight for conservative settings
Cons:
- Less distinctive design—won't stand out
- Standard plastic temples (no metal accents)
- No signature athlete connection or story
- Less aggressive sport-inspired styling
Oakley Chamfer Squared 8143 Eyeglasses
Pros:
- Premium metal construction for refined aesthetic
- Similar price range ($217–$242)
- Lighter weight than O Matter
- More traditional eyeglass styling
Cons:
- Less impact-resistant than O Matter
- No Unobtainium grip technology
- Less sport-inspired—more business casual
- Not part of athlete signature collection