Made out of flexible and comfortable Matte black TPE, the nose piece upgrade blocks your eyes from seeing each others light. These are included with the newest version of the goggles however older models do not have this feature. The upgrade is easy to install requiring only a few dabs of dap rapid fuse all purpose adhesive, which you can find here https://tinyurl.com/AMZGLUE. We have also created an instructional video on how to install it properly here {Coming Soon}