BASSLINE - Rechteckige CR-39 Sonnenbrille

The most reliable trick: take a pair that already fits you and read the three numbers printed inside the temple arm — lens, bridge, and temple length in millimetres, like 52-18-140. Staying within a millimetre or two of your usual lens and bridge width keeps the fit familiar. Compare those against the measurements shown above where listed — and if the fit is off on arrival, 30-day returns cover the swap.

Yes — these carry a UV400 rating, meaning the lenses are designed to filter UV wavelengths up to 400 nanometres, covering both UVA and UVB. Worth knowing: tint darkness has nothing to do with UV filtering — the rating is what counts, and this pair has it.

A polarizing filter cuts glare bouncing off flat surfaces — roads, water, car bonnets — so colours look deeper and your eyes work less in hard light. One thing to know: polarization is a comfort feature and separate from UV rating — one doesn't imply the other. Our polarized pairs carry it in the name; if polarization matters for how you'll wear these — driving, time near water — email us and we'll point you to the right pair.

Email info@theservir.com within 30 days of delivery with your order number. The pair must be in its original condition. We'll take it from there.

Rinse grit off with lukewarm water first, then dry with a microfibre cloth — never a shirt hem, which micro-scratches lenses over time. Store them in a case, lenses up, and keep them off the car dashboard: trapped heat is the fastest way to warp any frame.