Ergonomic, tilt frame design keeps the lenses close to the cheekbone and out of the wearers line of sight. Split lens feature tightly surrounds the nose bridge, cutting out light and eliminating glare. Rubber dot temple gloves are extremely soft and grab the head, keeping the frame secure. Clear, neoprene rubber nose pad can be adjusted for optimal nose bridge alignment. Flawless, pivot hinge gives added strength and the illusion of one constant frame from temple to temple. "Slot" technology makes the changing of lenses a snap, so you can customize your system according to your application. Comes with two interchangeable lenses 1)Bronze Brown 2)Clear with soft micro fiber case. Additional accessories, the elastic strap and hard case, can be ordered separately.