Cablz Silicone Mini Black SILICONE. Constructed from 100percent silicone they feature the same streamlined style and many of the same benefits of the other Cablz Glasses Retainers - at a fraction of the price. Being made from silicone the Cablz Silicone Glasses Retainer System is extremely flexible lightweight and durable. The Cablz Silicones are also incredibly comfortable waterproof and non-conductive making them perfect for constant wear. If you are looking for a reliable stylish comfortable Glasses retainer system at a lower price point the Cablz Silicone Glasses Retainer System is the choice for you. Package Contents: Cablz Silicone Mini Glasses Retainer