North, south, east or west, the sleek, definitive direction of the Revo Heading Sunglasses is ideal for setting a bold course. Designed for all of lifes navigational activities and engineered with a frame construction technology adds that extra level of comfort and security. Revo high contrast polarized Serilium lenses. Spring hinge ensures greater range of motion and boosts frame durability. Elastomeric nosepad prevents slippage during action. Authentic Revo prescription lens ready. 8 base lens technology. b: 35 ed. 61. Measurements: 59 17 123. Blue water lense perfect for cutting glare in bright conditions on the water. Terra lense actively filters the light spectrum to provide clear vision. Graphite lense enhances natural vibrant colors while blocking harmful rays and harsh glare. Blocks 100% UVA B C .