These Pathfinder Category 4 Sunglasses are Ideal for snowboarding, skiing, or any other snowy activity. With category 4 lenses these sunglasses protect your eyes from snow glare and low winter sun. The removable side shields offer additional protection. When your activity intensifies these sunglasses stay secure, the thermogrip® rubber contact provides grip when the skin is wet and sweaty. These sunglasses make reliable adventure companions however, category 4 lenses are not recommended for use while driving as the lens is too dark to see clearly.