The Hyperice Vyper Vibrating Foam Roller is a high-quality fitness equipment designed to provide vibration technology for a unique workout experience. Made from a combination of foam and plastic materials, this black foam roller offers a comfortable and effective way to relieve muscle tension and improve flexibility. With the Hyperice brand reputation and innovative design, the Vyper model is a popular choice for fitness enthusiasts looking to incorporate a new and exciting element into their workout routine. Works very well. Power cord not included.