UV 400 PROTECTION - All lenses have a 400UV protection rating， meaning it can block 99%-100% of both UVA and UVB harmful radiation. Ultraviolet (UV) radiation is present in natural sunlight and has a wavelength range of 400nm to 100nm. UV400 rated sunglasses are essential to protecting your eyes against long- term UV damage and keeping your eyes healthy when out and about<br />POLYCARBONATE LENS - PC lens are tough， lightweight， scratch resistant， have high optical clarity (distortion free， clear vision) and are up to 10 times more impact-resistant than plastic or glass lenses， making them an excellent choice for outdoor sports activities. Originally developed in the 70s for aerospace applications， they are now the preferred choice of material for children's glasses and safety glasses.<br />LIGHTWEIGHT AND UNBREAKABLE - The lens is made of polymer material with a memory that is extremely light and super flexible. Shatterproof flexible polycarbonate lens are impact， scratch resistant， durable and unbreakable. Durable and adjustable nose pads give you the best fit. More comfortable with spare rimmed soft rubber pad. Suitable for outdoor sports like cycling， motorcycle， golf， skiing， riding， driving， racing， fishing， running， climbing， hiking， traveling， trekking， etc.<br />LEN COLOR SELFADJUSTABLE - The smart lens can adjustable its colour to different circumstance: growing deeper outdoors， lighter indoors， transparent in the evening， which cuts off the inconvenience of changing lens. Restore true color， eliminate reflected light and scattered light make the scenery more clear and soft and protect eyes perfectly. 3 Lens are included: 1xPolarized Len， 1xColor-Changeable Len， 1xBEF Lens.<br /><br />Specifications:<br />1.Glasses with a photochromic lens<br />2.Gain light lens<br />3.Polarized lens<br />4.Myopia Frame<br />5.Glasses case<br />6.Glasses bags<br />7.Lens cloth<br />8.Glasses lanyard<br />9.Polarize test sheet