The V-28B Helmet Lens Visor is a replacement face shield specifically designed for the THUNDER 4 SV Motorcycle helmet. It is an accessory that allows you to replace the existing lens on your helmet and enhance its functionality. This visor is produced using polyester material, which offers durability and resistance to various environmental conditions. Polyester is known for its strength and ability to withstand impact, making it suitable for motorcycle applications. The V-28B Helmet Lens Visor is compatible with the Thunder 4 model helmet produced by the HELMETS brand. It is designed to fit securely onto the helmet, ensuring a proper and reliable attachment. As a replacement face shield, it provides additional lens options for the Thunder 4 SV helmet. This means you have the flexibility to replace the existing lens with different tints or functionalities as per your preference and riding conditions. Please note that the V-28B Helmet Lens Visor is specifically made for the THUNDER 4 SV helmet model and may not be compatible with other helmet brands or models.