The MBX® Massage Ball provides intense deep tissue compression for ultimate relief of aches and pains. Designed to replicate the pressure a massage therapist's elbow the MBX® Massage Ball is ideal for targeting extreme discomfort is isolated areas such as calves, piriformis and pecs.    Features Extra-firm for aggressive deep-tissue compression and relief of aches and pains Ideal for intense application on small areas like calves, piriformis, and pecs Encourages blood and oxygen flow to enhance overall movement, range of motion and performance Foam surface is easier to clean and more hygienic than cloth 6.60cm diameter, 0.63kg Backed by 1-year manufacturer's warranty...