IST RX Prescription Swim Goggle with Optical Corrective UV Protection Anti-Fog Lenses CUSTOMIZABLE  Pair different corrective lenses to best meet your individual needs. SHATTERPROOF  Shatterproof, impact-resistant lenses are durable and safe. COMFORTABLE WEAR  Split silicone strap ensures a snug fit while preventing painful squeezing. HYPOALLERGENIC  Made with soft, liquid-injected silicone ideal for sensitive skin. SUN PROTECTION  100% UV protection guards your eyes from harmful rays.