These sunglasses by ASOS have been constructed with base metal frames and plastic lenses. The details include: aviator styling, ombre lenses, soft plastic nose pads, leather covered top bar, slim leather covered temples and curved temple tips. Body: 100% Base metal Fabric: 100% Real Leather Lens: 100% Plastic TOTAL UV PROTECTION Filter Category No. 3 UV 400 Tested to BS EN 1836:2005 Not for direct viewing of the sun or for use in a solarium Non-prescription sunglasses Comes with a soft pouch case