The absolute toughest looking shade-saver ever created is here. Introducing the world's FIRST Barb-Wire sunglasses retention system built from the ground up by the Heat Wave Visual design team. Made from durable injection silicon with great elasticity, so while these have a hard as nails look, they are soft as it gets. Silicon eyelets fit nearly ALL eye wear ear stems/arms. *NOTE - H20 FLOATING GLASSES WILL NOT FLOAT WITH THIS STRAP