The 6" Deep Tissue Chirp Wheel+ helps reduce back pain by decompressing your spine, strengthening core muscles, and massaging out tight trigger points. Made with a rigid ABS plastic core and soft EVA compression sensitive mat, the Chirp Wheel+ can support up to 500 pounds! The 6" Deep Tissue Chirp Wheel+ offers a deep tissue massage to knead out tight muscle knots along your spine and leave you feeling great.