What Our Gearhead(R) Experts Are Saying: "I love how the Kostin Polarized Sunglasses blend classic style with modern performance. The rounded acetate frame feels sturdy yet comfortable, and the keyhole bridge adds a vintage touch. The polarized lenses cut glare effortlessly, making these my go-to for everything from road trips to sunny hikes. Plus, knowing they're made with recycled and bio-based materials makes me feel even better about wearing them."Timeless design meets modern performance in the RAEN Kostin Polarized Sunglasses. Inspired by classic optical frames, Kostin scales up to create a bold, versatile look that suits any adventure. The robust acetate frame feels substantial without being heavy, while the keyhole bridge and sleek temple design add subtle sophistication. Beyond style, these sunglasses deliver premium performance. The polarized lenses enhance clarity and cut through glare, making them perfect for everything from long road trips to afternoons by the water. Crafted with recycled and bio-based materials, they let us embrace sustainability without sacrificing function or fashion.