High-performance technology packaged in a lightweight, full frame construction for a pair of sunglasses you can take to the beach or on the trail. By using biodegradable resin agriculturally derived from castor beans, Native sunglasses offer environmentally friendly construction that is resilient and durable. Resin from castor beans has a higher strength to weight ratio compared to synthetic materials while being lightweight.Native Eyewears use of sustainable, earth-friendly materials brings you back to the purity of nature while intuitive features keep your eyes protected from the elements. Key Features Interchangeable lens technology to accommodate varying light conditions N3 polarized lenses for excellent protection against damaging UV rays SportFlex Lens Kit offers 65% visible light transmittance (VLT) for better visibility in low light situations Co-Injected Rhyno-Tuff Air frames offer lightweight yet sturdy construction Cushinol offers non-slip grip in all the right places Made of sustainable, eco-friendly materials Mastoid Temple Grip hugs behind ear Cam-action hinges quickly lock in place Optic gear kit includes a hardcase and a soft case that doubles as a cleaning cloth Large fit frames are comfortable and best for large/extra-large profiles All Native sunglasses are backed by a lifetimewarranty Interchangeable Lens Design Quickly change lenses in different lighting conditions. Interchangeable lenses are also designed to prevent the lenses from shooting back toward your eye during accidental impact. Both sets of lenses come standard with protective coatings for scratch resistance. N3 Polarized Lens Technology N3 polarized lenses block up to 4x more infrared light than regular polarized lenses. As Natives most innovative and advanced polarized lens, the N3 provides UV protection up to 400nm and significantly reduce blue light while selectively filtering UV light. The result is high-contrast and optimal visual definition while protecting your eyes from the effects of long-term sun exposure. All Native lenses are impact-resistant and built with poly-crystal carbonate