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Superflex SF-581 Eyeglasses
Superflex SF-581 Eyeglasses
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$60.91

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Lenses from $29.99 · Ready in 2–7 business days

Superflex SF-581 Eyeglasses

S301 - NAVY COFFEE / 60

  • Ships within 1 to 5 Days

    Shipping information is provided by the manufacturer.

WG_SF581_S301_6017
ADD PRESCRIPTION

Lenses from $29.99 · Ready in 2–7 business days

Superflex SF-581 Eyeglasses Superflex SF-581 Eyeglasses Superflex SF-581 Eyeglasses
Superflex SF-581 Eyeglasses
Superflex SF-581 Eyeglasses
Superflex SF-581 Eyeglasses
  • Free Shipping
    Free Shipping
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    Price Match
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    Licensed Opticians
ADD PRESCRIPTION

Lenses from $29.99 · Ready in 2–7 business days

Add To Cart For Lowest Price
$60.91

You save 0%

Color

Size

S301 - NAVY COFFEE / 60
S303 - GREY / 60
S300 - BLACK TORTOISE / 60
S300 - BLACK TORTOISE / 58
S303 - GREY / 58
S301 - NAVY COFFEE / 58

*Swipe to view more color variants

  • Free Shipping
    Free Shipping
  • Price Match
    Price Match
  • Easy Returns
    Easy Returns
  • Licensed Opticians
    Licensed Opticians
DESCRIPTION RATINGS & REVIEWS PRESCRIPTION GUIDE

The Superflex SF-581 eyeglasses deliver practical, everyday eyewear at a price that makes sense. Designed in Quebec, these full-rim rectangle frames combine clean lines with functional features that hold up to daily wear.

Durable Acetate Construction

The SF-581 is built from acetate, a plant-based material derived from cotton and wood pulp. Acetate frames offer better flexibility and durability than standard injection-molded plastic, resisting warping while maintaining their shape over time. The material is naturally hypoallergenic, making it comfortable for extended wear without skin irritation. Available in three versatile colors—Navy Coffee, Grey, and Black Tortoise—the acetate construction allows for rich, fade-resistant color that won't chip or peel like painted frames.

Spring Hinges for All-Day Comfort

These frames feature spring hinges (also called flex hinges) that allow the temples to extend beyond the standard 90-degree angle. This flexibility provides several real benefits: the frames adapt to different head sizes without pinching, they're less likely to break when you take them on and off, and they stay secure during physical activity. Spring hinges reduce stress on the frame, making them particularly good for active wearers or anyone who's rough on their glasses.

Prescription-Ready & Progressive-Compatible

The SF-581 is fully prescription-ready and works well with single-vision, bifocal, and progressive lenses. The rectangle shape provides sufficient vertical depth for progressive lens zones, making these a solid choice if you need multifocal correction. Available in two sizes—58mm and 60mm lens width—with a 17mm bridge and temple lengths of 145mm or 150mm respectively.

The rectangle shape flatters round and oval faces by adding structure and definition. These are straightforward, no-nonsense frames that work equally well at the office or on the weekend—functional eyewear that doesn't try to be more than it is.

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Frequently Asked Questions

Are the Superflex SF-581 eyeglasses compatible with progressive lenses?

Yes, the SF-581 frames are compatible with progressive lenses. Rectangle frames with sufficient vertical depth like the SF-581 provide enough space for the three vision zones (near, intermediate, and distance) to transition smoothly. Both the 58mm and 60mm sizes work well with progressive prescriptions.

What are the benefits of spring hinges on these eyeglasses?

Spring hinges (flex hinges) allow the temples to extend beyond 90 degrees, providing enhanced comfort and durability. They adapt to different head sizes without pinching, reduce the likelihood of frame breakage during daily use, and make the glasses more resistant to wear and tear. This makes them ideal for active wearers or anyone who needs all-day comfort.

How do I care for acetate eyeglass frames?

Clean your acetate frames with lukewarm water and mild soap, then dry with a soft microfiber cloth. Avoid exposing them to extreme heat, which can cause warping. Store them in a protective case when not in use to prevent scratches and maintain their shape. Acetate is low-maintenance and doesn't require special cleaners.

What face shapes work best with rectangle eyeglasses?

Rectangle frames are ideal for people with round or oval face shapes. The angular lines of rectangle glasses add structure and definition, balancing softer facial features. They're one of the most versatile frame shapes and work well for most face types except very square faces.

What sizes are available for the Superflex SF-581?

The SF-581 is available in two sizes: 58-17-145 (58mm lens width, 17mm bridge, 145mm temple length) and 60-17-150 (60mm lens width, 17mm bridge, 150mm temple length). Both sizes feature the same 17mm bridge width. The size you choose depends on your face width and personal fit preference.

Are acetate frames more durable than regular plastic frames?

Yes, acetate frames offer superior durability and flexibility compared to injection-molded plastic frames. Acetate is less prone to breakage, can withstand accidental drops better, and maintains its shape over time without warping. The material is also hypoallergenic and features richer, more enduring colors that don't fade easily.

Compare With Similar Frames

How the Superflex SF-581 Eyeglasses stacks up against the closest alternatives we carry.

This product
Superflex SF-581 Eyeglasses
Superflex Superflex SF-581 Eyeglasses $60.91
Otis & Piper 4002 Eyeglasses
Otis & Piper Otis & Piper 4002 Eyeglasses $64.00$51.50
  • Lower price point at $51.50
  • Rectangle frame style
  • Full-rim construction
View frame →
Read the full comparison

Superflex SF-581 vs. Similar Budget-Friendly Frames

If you're considering the Superflex SF-581, you might also be looking at other affordable rectangle frames. Here's how the SF-581 stacks up against comparable options in our collection.

SF-581 vs. Superflex SF-484 & SF-541

All three models come from the same Quebec-designed Superflex line, so you're getting consistent quality and construction. The SF-484 ($63.69-$86) and SF-541 ($60.91-$64.59) sit in the same price range as the SF-581 ($60.91). The main differences come down to frame shape, color options, and sizing. If you like the Superflex brand's reputation for durability and spring hinge construction, any of these models will deliver similar performance—choose based on which style suits your face shape and personal taste.

SF-581 vs. Otis & Piper 4002

The Otis & Piper 4002 ($51.50) offers a lower entry price if budget is your primary concern. Both feature rectangle styling and full-rim construction, but the SF-581's acetate material and spring hinges provide better long-term durability and comfort. Superflex is also a more established brand with a track record for quality materials. If you can stretch your budget by $10-15, the SF-581's superior construction and flex hinges make it the better value over time.

Why Choose the SF-581?

The SF-581 hits a sweet spot: genuine acetate construction, spring hinges for durability and comfort, progressive-lens compatibility, and a price under $65. For everyday prescription eyewear that needs to hold up to real use without breaking the bank, it's a solid, practical choice.

At a Glance

Superflex SF-484 Eyeglasses

Pros:

  • Same Superflex quality and construction
  • Similar price range ($63.69-$86)
  • Likely features spring hinges and acetate construction

Cons:

  • Different style/shape may not suit all preferences
  • Specific measurements may differ from SF-581

Superflex SF-541 Eyeglasses

Pros:

  • Same brand reliability and warranty
  • Very similar price ($60.91-$64.59)
  • Consistent Superflex quality standards

Cons:

  • May have different frame shape or size options
  • Style differences may not appeal to everyone

Otis & Piper 4002 Eyeglasses

Pros:

  • Lower price point at $51.50
  • Rectangle frame style
  • Full-rim construction

Cons:

  • Less established brand than Superflex
  • May not include spring hinges
  • Unknown material quality compared to Superflex acetate

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