PS:Our photochromic lens with good quality is not same as others which change very quickly and obviously under the sunlight,we have used ultraviolet light on it is obvious like the video showed,so take easy to use it with photochromic effect.This will be last for a long time not easy to fade. if you mind it is not changed obviously,pls not make order!Thanks Queshark Photochromic Cycling Eyewear Bicycle Bike Glasses Outdoor Sport MTB Bicycle Bike Sunglasses Goggles Bike Racing Glasses Description: Brand:Queshark Gender: Unisex Color: Black Weight: 30g/pair Lens Material: TAC+TR90 memory molecular material Material frame: TR Plastic Frame Protection cyclist eyes from UV-400 UV (100% of UV protection) Non-slip nose pads is adjustable. Photochromic Suitable: cycling, skiing, Driving, fishing ,runing ,and all outdoor sport Package Including: 1.Only sunglasses: One Sunglasses 2.PackageA:Glasses+Paper Box+Tag and Rope + Soft Bag+ Clean Cloth + Free Gift 3.PackageB:Glasses+Eva Box+Tag and Rope + Soft Bag+ Clean Cloth+ Free Gift Note: This one not polarized oneonly Photochromic,If you need Polarized one,you can click on this link or picture as below: