Made of TPE material, This extra-firm ball muscle roller are perfectly fit for rolling along the spine, hip-bone or anywhere like a larger area of massage than a single massage ball would cover.It can provide greater than other material balls, while rubbing out tension from the of the neck down to sacrum, from the base of the spine to the toes. Features - ColorAssorted Color - Material: TPE - Size: 6.3 x 6.3 x 6.3cm - Made of TPE material, and has no smell or seams, practical and durable. - material make it can provide greater than other balls, while rubbing out tension from the of the neck down sacrum, from the base of the spine to the toes. - Easy to use- Great for rolling, rehab, physical therapy, self massage, , and interval training recovery. - This extra-firm ball muscle roller are perfect for rolling along the spine, hip-bone or anywhere like a larger area of massage than a single massage ball would cover. - Easily integrates into any yoga, , cycling, running, weightlifting, physical therapy, , rehabilitation, and sport’s medicine exercise routine. Package list: 2 x Balls