Pele's Hair is also the name for the fine threads of volcanic glass that form when sprays of lava droplets cool rapidly in the air. The thin titanium, reverse-groove unisex frame construction is reminiscent of those same strands of lava spray, while the MauiBrilliant lenses are nearly as crisp as glass lenses, but with just one-third of the weight. All Maui Jim sunglasses come with a case and cleaning cloth.