Our rings are made from a hybrid blend of premium natural materials; Sand, water, carbon, and oxygen. We call it H2ECO and we didn't sacrifice one ounce of performance. Our propietary ultra soft and cool-to-the-touch material goes the distance. Benifits Include: - Human and earth friendly - Will not fade, stain, scratch, crack, or degrade - Durable while maintaining an ultra-soft feel - Biocompatible and hypoallergenic - More resilient than plastic and rubber