Officially licensed earplugs of NASCAR. Put some fun in your hearing protection program with Goin Green Earplugs. They have a bright green swirled color for winning compliance; and when it comes to comfort no one beats Goin Green Earplugs to the finish line. Made from extra soft, low pressure foam that provides a very comfortable fit. They are the highest independently tested NRR too. NRR 33. NASCAR is a registered trademark of the National Association for Stock Car Auto Racing, Inc. The NASCAR trademarks are used under license by The National Association of Stock Car Racing, Inc.