Patent pending groove ring is the first breathable active silicone ring. It is tough, low profile, and comes with an unlimted Lifetime Warranty. It is the last ring you will ever buy. Groove is for the athlete, the adventurer, the professional, the trend setter. It begs to be worn, shown and tested everyday no matter what the circumstance. Groove "Original" is what started it all. This ring was first seen on Kickstarter in December of 2015 and launched Groove Ring into the world. Still our best seller, the Groove Original is 8mm wide and super low profile. Made from 80 durometer medical grade silicone, Groove is the first and only active ring to be liquid poured. This means fine detail and perfect design with little to no mold marks or flaws. Groove silicone is resistant to most common chemicals including gasoline, oil, diesel, and household cleaning products. Groove is also non porous, non conductive, heat resistant, and hypoallergenic. Groove is two rings in one. We first began with the inner ring. Slightly firmer and full of infinity grooves that allow the ring to breathe. The inner ring also features an inverse arch know as a "comfort fit" that lessens the contact with your skin.