Durable material –The foam rollers have been built with EPP- High Density ,so that they can help you break the stiffness in all your muscles. The foam rollers have been made in such a way that they can handle any adult weight that is placed on them as you try to break the stiffness that is causing your severe back pain. Secondly, the durable material is to ensure that the foam roller serves you for a long time to come.Multi-usage – Aside from just self-myofascial treatment, the foam rollers can also be used in yoga. Additionally, physical therapy and massage therapy are two other areas where these can be put to use.Lightweight – The foam rollers are lightweight and can easily be carry if you are going for a journey. This allows you to continue your therapy, even if you are away from home.