Plastic+Metal frame, Tri Acetate Cellulose lens. The sunglasses for Sunglasses for Oakley Ox8081 Plank 2.0 55-18.This Size Dimensions (mm): Lens Length: 55, Bridge Length: 18. Absorbing over 99% of harmful UVA & UVB spectrum. To some extent, it can protect your glasses because the lens is scratch-resistant. Clear and Comfortable Vision - the clearer vision, the more convenient and safer life; Polarized Lenses can reduce glares and reflections, great for driving and fishing. Recommend For - Driving, fishing, hiking or other outdoor activities under the sun. Custom Fit Polarized CLIP-ON Sunglasses For Sunglasses for Oakley Ox8081 Plank 2.0 55-18 Features: 1. Handcrafted workmanship on clip on lenses, virtually unbreakable Plastic Clip mechanism. 2. 100% UV and full polarized protection from harmful sunlight. 3. Convenient one hand application to Prescription frames with positive indexing lens position. 4. Scratch and Impact Resistance. Ultra light weight. Disclaimer: Our clips are not affiliated with Oakley in any aspects.