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S4 Optical Armor® is a defense system in optics. S4 Xglare™ Polarized lenses are a unique multi-layer composite, highly impact resistant, and provide 100 % UV protection and scratch resistance. The S4 Technoclear lenses are premium polycarbonate with 100% UV protection and optically correct de-centered vision field. Flexshape performance frames are engineered for comfort and durability. All S4 Optics are backed with a lifetime warranty. Chill, Uppercut, Elle & Starsky are not Xglare Polarized. Cooper has wire frame with rubber nose and ear piece. Starsky, Indie and Polaris have rubber ear pieces. Elle has rubber nose piece. Limited quantity on Castello item #437961 & Upper Cut item #437624. UPC: 045733007506
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