The Suncloud Optics Polarized Portal Sunglasses offer incredible value with their lightweight, face-wrapping fit combined with the glare-cutting optics of a polarized lens. Not only does the polarized lens kill distracting glare bouncing off reflective surfaces like water and snow, but it also snaps out quickly for adjusting to varying light conditions. Suncloud Optics includes a bonus Rose lens for clear vision in low-light conditions where darker lens tints compromise your vision. Lens slits along the top add functional ventilation to prevent fogging when you're sweating profusely on the trail. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.