Photochromic lens: our polarised photochromic lens can sense the intensity of light changes and absorb the ultraviolet rays. Lens become darker immediately when the light is stronger, which ultimately filter strong light and strengthen your visual definition without interfering your perception of color, and effectively reduce eye fatigue. Solid and durable material: This sunglasses lens is made of premier TAC polarised technology, along with metal frame, metal hinges and silicone nose pads, which are all solid ,durable and lightweight, easy for you to carry everywhere. Casual 100% UV400 protection: coated with two layers of UV400 protective films, TAC enhanced polarised film and PVA polarised filter film, which can block 100% of harmful UVA and UVB, filter glare, blue light and reflected light, powerfully protecting your eyes from visual harm and disease during outdoor activities. Suitable for any occasion: classic pilot style, however we made some changes on the traditional round shape so that it now looks more stylish and is also easier to match with everyday outfit, suitable for any sports, party, fishing, shopping, hiking and etc. Exquisite details: the 3D anti-slip curvy temples make it firmer and more comfortable when wearing our sunglasses. Designed with horizontal texture on the frame, as well as the upgraded pilot lens shape, make the whole sunglasses look more exquisite and unique. More comfortable wearing experience: with our upgraded durable metal hinges, temples can be expanded for 15 for both sides, which reduces burden on your head and ears, and is ideal for all kinds of face shapes.