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. Spartacus Elastomer Cock Rings can be used with any lubricant, oil, or cream. The Elastomer Metro Cock Ring's elegant shape conveys a sophisticated appeal and is available in blue and black.