POSHEI Sport Sunglasses Are Designed for Driving, Cycling and all Outdoor Activities. Lens Made of Shatterproof Unbreakable PC Material are Durable Enough for Long Time Using Package including 1* Sport Glasses Frame 5* Lenses(The Black One is Polarized Len) 1* Hard Protection Box 1* Elastic Sport Belt 1* Lenses Pouch 1* Cleaning Cloth 1* Movement Head Harness How to remove lens 1)With two finger down carefully pull the two sides of the lens,frist down pull the lens from left side and then right sides. 2)Then push the nose bridge towards the top of sunglasses until lens releases from top. 3)Then put lens down and out How to install lens 1) Put the lens in the middle of the frames beam position, with his thumb to push lens until stuck. 2) Will the left lens alignment with left of slot position and advances up, the right sight do as the same. 3) Until the lens in the mirror completely fixed as far. Different function of the five interchangeable lens. 1) Yellow lens: Called night vision lens, more bright and clear. Suitable for twilight morning and in dim lighting conditions. 2)Blue Lens: Filtering dazzling light on the sea, suitable for playing on the seashore. 3) Clear lense:Absorbing infra-red radiation, suitable for overcast and rainy day. 4) Revo lens: Protect eyes from the damage of ultraviolet,Infrarede etc.Suitable for those people who work in the condition of strong and bright light. 5) Polarized lens:anti-glare,UV400 protection, Suitable for driving,fishing,climbing,cycling and others outdoor sport. Read More »