Raen Optics

KOSTIN-Recycled Black / Green Polarized-48

$123.00

★★★★★4.9 · 73 reviews

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KOSTIN-Recycled Black / Green Polarized-48
  • Covered by Kongi Protection
  • Usually ships within 24 hours

Return Policy

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Raen Optics

Free returns within 21 days of delivery.

  • Original shipping isn't refunded.

Bought on Kongi? Start your return from your order on Kongi, not on Raen Optics' site.

Raen Optics' Full Return Policy ↗

How Returns Work

  1. Start a return from your order.
  2. Send it back with the label we email you.
  3. Get your refund once it arrives.

Description

Inspired by our Froyd optical frame, Kostin scales up the classic optical silhouette with a robust acetate frame and an optimized fit for use as a sunglass. The result is a rounded sun frame that’s timeless and versatile, with nuanced details like a keyhole bridge, split bar tack hardware, and flipped temple design. Kostin is available in our Recycled Black and our Bio acetate, for those that want style and sustainability.

Reviews

From raen.com

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★★★★★

Great quality sunglasses

Henryk P. · Jul 2026
★★★★★

great lenes and love the fit. Third pair. Thanks

Will A. · May 2026
★★★★★

Ordering and shipping were seamless. Love these shades! The fit awesome and lense is great across conditions. Drop in!

Clinton G. · May 2026

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