The Therapy in Motion Multi-Function Muscle Massage Roller has a versatile, ergonomic design allowing the user to perform self massage therapy as & when required. The innovative design of the spiked outer foam roller layer is perfect for both trigger point therapy & general massage. The foam roller itself is made of durable components in the form of ABS material & EVA foam. A great addition to this foam roller which separates it from many of its competitors is the internal storage compartment which can be used to store essential items whilst you work out. While its durable yet lightweight design makes it travel friendly. Whether your injured & undergoing rehabilitation or trying to remain injury free this trigger point muscle foam roller should be an necessity.