Take on your adventure while wearing a Spartan Race Beast Green - Original Groove Ring! Our Spartan rings were created for Spartan Race participants and fans alike. Our one of a kind Groove technology allows breathability and comfort on a level that no other silicone ring can match. Our grooves allow air in and moisture out, keeping your finger dry no matter what. The medical grade silicone keeps your ring flexibile, while maintaining durability and safety at the highest level. These Spartan rings are the perfect accessory for all Spartan Race athletes and fans.