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5% OFF ALL STORE - USE COUPON CODE "HIFALL26" EXCLUDING BRANDS: RAY-BAN, OAKLEY, COSTA DEL MAR, PERSOL, PRADA, RAY-BAN META, OAKLEY META & MIU MIU
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Superflex SF-603 Eyeglasses
Superflex SF-603 Eyeglasses
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$60.91

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

Superflex SF-603 Eyeglasses

M300 - MATTE BLACK / 53

  • Ships within 1 to 5 Days

    Shipping information is provided by the manufacturer.

WG_SF603_M300_5317
ADD PRESCRIPTION

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

Superflex SF-603 Eyeglasses Superflex SF-603 Eyeglasses Superflex SF-603 Eyeglasses
Superflex SF-603 Eyeglasses
Superflex SF-603 Eyeglasses
Superflex SF-603 Eyeglasses
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    Free Shipping
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    Price Match
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Lenses from $29.99 · Ready in 2–7 business days

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$60.91

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Color

Size

M300 - MATTE BLACK / 53
M300 - MATTE BLACK / 51
S303 - GREY CRYSTAL / 51
S401 - BLUE STRIPE / 51
S303 - GREY CRYSTAL / 53
S401 - BLUE STRIPE / 53

*Swipe to view more color variants

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

The Superflex SF-603 eyeglasses deliver practical, everyday durability in a clean square silhouette. Designed in Quebec and built from flexible acetate, these full-rim frames are engineered to handle the wear and tear of daily life without sacrificing comfort or style.

Flexible Acetate Construction

The SF-603 is crafted from cellulose acetate, a plant-based material that's stronger and more flexible than standard injection-molded plastic. Acetate frames resist cracking, hold their shape over time, and won't become brittle with age. The material is naturally hypoallergenic and lightweight, so you can wear them comfortably for extended periods. Available in three finishes—Matte Black (M300), Grey Crystal (S303), and Blue Stripe (S401)—the acetate construction delivers rich, fade-resistant color that lasts.

Square Shape & Prescription-Ready

The square frame shape offers a versatile, modern look that suits most face shapes. The full-rim design provides excellent lens security and works particularly well for higher prescriptions, as the thicker rim conceals lens edges. With a 17mm bridge and available in 51mm and 53mm eye sizes, the SF-603 accommodates a range of fits. These frames are fully prescription-ready and compatible with single-vision, progressive, and high-index lenses.

At this price point, the SF-603 represents solid value for anyone seeking dependable, budget-friendly eyewear that doesn't compromise on material quality. The flexible acetate construction means these frames can adapt to your face shape and withstand the occasional drop or bend—a practical choice for active lifestyles or as a reliable backup pair.

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Frequently Asked Questions

Are Superflex SF-603 eyeglasses prescription-ready?

Yes, the Superflex SF-603 frames are fully prescription-ready and compatible with single-vision, progressive, bifocal, and high-index lenses. The full-rim acetate construction provides excellent lens security and works particularly well for higher prescriptions, as the thicker rim helps conceal lens edges.

What is the difference between acetate and plastic eyeglass frames?

Acetate frames like the SF-603 are significantly more durable than standard plastic frames. Acetate is made from plant-based materials (cotton and wood pulp), making it stronger, more flexible, and resistant to cracking. It also holds color better, is hypoallergenic, and maintains its shape over time without becoming brittle.

What face shapes work best with square eyeglasses?

Square frames like the SF-603 work well for most face shapes, particularly oval and round faces where they add definition. The full-rim design is also excellent for concealing thicker prescription lenses. While traditionally round frames are recommended for square faces to soften angles, many people with square faces successfully wear square frames for a bold, structured look.

What sizes are available for the Superflex SF-603?

The SF-603 is available in two eye sizes: 51mm and 53mm. Both sizes feature a 17mm bridge width. The 51mm size has 135mm temples, while the 53mm size has 140mm temples. The different sizes accommodate narrow to average face widths.

Are Superflex eyeglasses durable for daily wear?

Yes, Superflex frames are designed with flexibility and durability in mind. The acetate construction allows the frames to adapt to various face shapes and withstand daily wear and tear better than rigid plastic frames. The flexible design makes them particularly suitable for active individuals and everyday use.

What colors are available for the SF-603?

The Superflex SF-603 is available in three color options: M300 Matte Black (a subtle, versatile matte finish), S303 Grey Crystal (a translucent grey), and S401 Blue Stripe (featuring blue striped detailing). All colors feature the brand's signature flexible acetate construction.

Compare With Similar Frames

How the Superflex SF-603 Eyeglasses stacks up against the closest alternatives we carry.

This product
Superflex SF-603 Eyeglasses
Superflex Superflex SF-603 Eyeglasses $60.91
Cargo C5058 Eyeglasses - designeroptics.com
Cargo Cargo C5058 Eyeglasses $99.98$52.99
  • Similar price range
  • Full-rim construction
  • Budget-friendly alternative
View frame →
Read the full comparison

Superflex SF-603 vs. Similar Budget-Friendly Frames

If you're considering the Superflex SF-603, you might also be comparing it to other affordable acetate frames in our collection. Here's how it stacks up against similar options.

SF-603 vs. Superflex SF-541

Both the SF-603 and SF-541 share Superflex's signature flexible acetate construction and sit at nearly identical price points around $60. The SF-541 offers a similar square shape with the same durability and prescription compatibility. The main differences come down to subtle design details in the temple styling and available color options. If you like the Superflex brand quality but want to explore slightly different aesthetics, the SF-541 is worth considering.

SF-603 vs. Superflex SF-607

The SF-607 is another strong contender within the Superflex family, priced between $59.52 and $86.00. Like the SF-603, it features full-rim acetate construction and prescription-ready design. The key difference is the frame shape—while the SF-603 offers a classic square silhouette, the SF-607 may have a different shape profile that could better suit certain face types. Both deliver the same flexible, durable construction Superflex is known for.

SF-603 vs. Cargo C5058

For shoppers comparing budget-friendly options across brands, the Cargo C5058 ($52.99-$86.14) offers similar full-rim construction at a comparable price point. However, the SF-603 benefits from Superflex's Quebec-designed heritage and specific focus on flexibility and durability. The Cargo frames are a solid alternative if you're prioritizing the lowest possible price, but the SF-603 offers the proven flexibility features that Superflex is known for.

Our recommendation: The SF-603 represents excellent value at $60.91 for anyone seeking durable, flexible acetate frames with a versatile square shape. Its combination of material quality, prescription compatibility, and budget-friendly pricing makes it a smart choice for everyday wear or as a reliable backup pair.

At a Glance

Superflex SF-541 Eyeglasses

Pros:

  • Similar price point and value
  • Same flexible acetate construction
  • Comparable square shape
  • Multiple color options available

Cons:

  • May have slightly different sizing options
  • Different temple design details
  • Color selection varies from SF-603

Superflex SF-607 Eyeglasses

Pros:

  • Comparable pricing
  • Same brand quality and flexibility
  • Full-rim acetate construction
  • Prescription-ready design

Cons:

  • Different frame shape may suit different face types
  • Sizing options may differ
  • Style aesthetic varies

Cargo C5058 Eyeglasses

Pros:

  • Similar price range
  • Full-rim construction
  • Budget-friendly alternative
  • Prescription-ready

Cons:

  • Different brand with potentially different flexibility features
  • May not have the same Quebec-designed heritage
  • Different style aesthetic

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