Product Details
Color Details
Size DetailsFrequently Asked Questions
Are Flexon J4009 eyeglasses suitable for active kids and sports?
What is Flexon memory metal and how does it work?
Can I add prescription lenses to Flexon J4009 frames?
What size should I choose for my child—49mm or 51mm?
Are Flexon frames hypoallergenic and safe for sensitive skin?
How durable are Flexon J4009 frames compared to regular kids' glasses?
Compare With Similar Frames
How the Flexon J4009 Eyeglasses stacks up against the closest alternatives we carry.
- Flexon memory metal in both bridge and temples for maximum flexibility
- Slightly larger lens options (49mm and 51mm) with longer temple length (140mm)
- Available in the same three classic colors (black, navy, gunmetal)
- Flexon flat metal bridge with plastic temples for a different aesthetic
- Classic colors designed for a 'mature look for juniors'
- Full-rim design for maximum lens stability
Read the full comparison
Flexon J4009 vs. Other Kids' Flexon Frames
Choosing the right Flexon frame for your child often comes down to budget, size, and how much flexibility you need. The J4009 sits in the middle of Flexon's kids' collection—more affordable than the premium Zeus model but with the same core memory metal technology that makes Flexon frames so durable.
J4009 vs. Flexon KIDS ZEUS
The Flexon KIDS ZEUS is the step-up option in the rectangular kids' collection. Both frames feature Flexon memory metal in the bridge and temples, but the Zeus is positioned as a more mature, sophisticated design with slightly larger sizing (51mm lens width with 140mm temples). The Zeus is priced at $94.15, while the J4009 starts at $43, making the J4009 a better value for budget-conscious families or parents who need backup pairs. If your child is older (10+) and wants a more grown-up look, the Zeus is worth considering. For younger kids or families prioritizing affordability without sacrificing durability, the J4009 delivers the same memory metal benefits at a lower price point.
J4009 vs. Flexon KIDS J4000 N
The J4000 N is another option in the 'J' series kids' collection, featuring a Flexon flat metal bridge but with plastic temples instead of the J4009's all-metal construction. The J4000 N offers a different aesthetic—some kids prefer the look of plastic temples—but the J4009's metal temples provide more flexibility and durability in an area that often takes a beating. Both are priced similarly at around $94.15, so the choice comes down to whether you want maximum flexibility (J4009) or a mixed-material design (J4000 N).
Why Choose the J4009?
The J4009 is the best all-around choice for parents who want proven Flexon durability at an accessible price. The all-metal construction with memory metal in the bridge and temples means fewer adjustments and repairs, and the classic rectangular shape works for a wide age range. If you're tired of replacing broken frames every few months, the J4009's memory metal technology is a game-changer—and at a starting price of $43, it's one of the most affordable ways to get genuine Flexon quality.
At a Glance
Flexon KIDS ZEUS Eyeglasses
Pros:
- Flexon memory metal in both bridge and temples for maximum flexibility
- Slightly larger lens options (49mm and 51mm) with longer temple length (140mm)
- Available in the same three classic colors (black, navy, gunmetal)
- Mature, sophisticated rectangular design
Cons:
- Higher price point at $94.15 vs. J4009's $43-$94.15 range
- May be too large for younger children
- Less budget-friendly for families needing multiple pairs
Flexon KIDS J4000 N Eyeglasses
Pros:
- Flexon flat metal bridge with plastic temples for a different aesthetic
- Classic colors designed for a 'mature look for juniors'
- Full-rim design for maximum lens stability
- Similar price point at $94.15
Cons:
- Plastic temples instead of metal—less flexibility in the temple area
- May not be as durable as the all-metal J4009 construction
- Fewer color options compared to the J4009's versatility