Johan Square Sunglasses

Verified claims

Polarization durability

Polarizing film is injection-molded into the lens, not a surface coating.

Lens weight

Plastic lenses weigh roughly half as much as glass, reducing nose pressure.

UV protection

Polycarbonate lenses inherently block 100% of UV up to 400nm, no coating needed.

Hinge maintenance

Periodic screw tightening and two-hand use prevent hinge loosening.

UV fading

Storing in a rigid case prevents UV fading of dark plastic frames.

Heat damage

Frame can warp above 50°C, mitigated by case storage away from sun.

Frame care

Rinse the plastic frame after active use to prevent permanent residue and scratches.

Cleaning

Rinse under water, then blot with a microfiber cloth to avoid scratches.

Handling

Removing sunglasses with both hands prevents permanent hinge misalignment.

Storage

Store in a rigid case to protect from UV fading and heat warping.

Product record

Title

Johan Square Sunglasses

Brand

Le 31

Price

29 CAD

Availability

In stock

Durability and care of the plastic frame

• The small metal hinges on budget plastic frames are press-fit into the material rather than secured with reinforcing plates, so the plastic around the screw can loosen over time — a periodic one-quarter turn with a jeweler's screwdriver keeps the temple arms from developing play that leads to misalignment and uneven stress on the bridge.
• The colorant in dark plastic frames is vulnerable to UV degradation, which can fade the charcoal or brown hues to a chalky gray within a single summer of unshielded outdoor exposure; storing the sunglasses in a rigid case when not in use blocks UV and dramatically slows the fading process.
• Because the plastic frame is thermoplastic, exposure to temperatures above about 50°C (common inside a parked car on a sunny day) can cause the frame front to warp and alter the lens alignment, potentially allowing lenses to pop out; keeping the sunglasses in a case and away from direct sun when not in use eliminates this risk.
• Salts from sweat and chemicals in sunscreen and insect repellent can corrode the frame's surface, leaving a sticky residue or pitted texture that is irreversible; rinsing the frame with fresh water and mild soap after each wear in hot or active conditions prevents the buildup of damaging residues.
• Wiping a plastic frame with a dry cloth or, worse, a paper towel, grinds surface dust into the finish, creating a network of fine scratches that dull its appearance; rinsing the frame under water to float debris off, then blotting dry with a microfiber cloth, preserves the original satin or gloss finish for years.
• Using one hand to remove sunglasses torques one hinge laterally, and repeatedly doing so on a plastic frame gradually stretches the hinge mounting point, leading to a permanently loose fit; always using both hands to put on and take off the glasses distributes the force evenly and maintains the frame's geometry.