HART Myotherapy Rollers Athletics Recommend using foam or lightweight

Recommend using foam or lightweight balls no bigger than 16cm diameter

The HART Air Cell Mat - 50cm high combines three foam layers with different densities and compression rates for excellent impact absorption and comfort

however the HART Sport low compression 60mm balls are fine

Hand placement markings on the ball for best grip & correct position

HART Myotherapy Rollers Athletics Recommend using foam or lightweightHART Myotherapy Rollers feature a "H" design which aids in spinal alignment when releasing paraspinal muscles. The pimple surface on the roller adds comfort to body rolling and releasing trigger points helps to reestablish proper movement patterns to enhance performance. 15cm model provides a smaller alternative to traditional foam rollers to pinpoint smaller muscles. Firm, solid, lightweight EVA foam. 15cm diameter. Foam Density Hardness: 50 35.