Because that's how much they weigh.
When you're trying to let loose and have fun, nothing is more of a downer than some heavy shades that keep your head down. The Oakley Sliver is designed to keep the party at its maximum with its lightweight O-Matter frames that feature structural relief cut outs on the temples to keep them practically floating on your head. Plutonite® lenses are highly impact resistant and their XYZ Optics® geometry makes sure everything is crystal clear so you don't miss a thing.
100% UVA/B/C protection. Available in multiple lens / color options. Includes microfiber cleaning bag. Measurements: 57 mm lens width, 18 mm bridge, 42 mm lens height, and 140 mm temples. Approximate weight is 24 g.