Lightweight and durable, these sunglasses feature impact-resistant polycarbonate lenses that are polarized to reduce glare from water and other reflective surfaces. They also block both UVA and UVB light. Frames are flexible Grilamid TR90 polymer with rubber end tips for added comfort and to reduce frame slippage while active. Black frames have brown polarized lenses with red reflective coating; Tortoise frames have gray polarized lenses with blue reflective coating; Navy frames have gray polarized lenses.