Elastomer is a stretchy, highly flexible material. Elastomer?s durability and longevity make it a smart choice for long-lasting, high-quality toys like Spartacus Cock Rings. Free of latex and phthalates, elastomer can be used with any lubricant, oil, or cream. The Elastomer Stud Cock Ring features spikes, which creates an alternative look. It?s available in purple, blue, and black.