MODEL: BP-6351. Flip-up Lens Sunglasses Kit(BLACK) with Polarized lens, Optical Insert, UV Protection,Case. Flip-up lens design allows use of binoculars or scopes. Flip up lens for use indoors or when reading. TAC polarized lens protect eyes from harmful UV light and debris. Prescription optical insert is included for use if you need it. Attractive, sporty design in sporty shiny black. Looks great anytime, anywhere! Complete kit. Includes Sunglasses, hard case, soft carry cleaning case, cleaning cloth, prescription optical insert and neck cord. Flip-Up hinge locks positively in position. Meets ANSI and EU impact and UV protection standards.