Unisex sports sunglasses: The Alpina Sports ROCKET V+ are modern photochromatic or self-darkening glasses. The self-tinting covers all three sun protection categories, S1-S3, That means from completely clear to dark. A great advantage is the fogstop finish with non-fogging lenses and hydrophobic treatment that removes water from the lenses. This allows you to customise the the nose piece width according to your head size for the most comfortable fit.