Cablz Silicone XL Eyewear Retainer. Cablz Silicone has the same signature look of Cablz at a value price. They are extremely flexible and very comfortable with the same benefits of our original Cablz. Specifications for Cablz Silicone XL Glasses Retainer: Manufacturer: Cablz Size: 10 mm Additional Features: 2.5in Width Length: 10 mm Width: 2.5 in Package Contents: Cablz Silicone XL Glasses Retainer