Chirp wheels have a padded spinal canal to cushion your back while delivering pressure to relieve various pains. They fit perfectly between your shoulder blades and support up to 500 lbs.
Spinal alignment: The narrow wheel fits directly between your shoulder blades, letting your spine sink into the center groove without putting direct pressure on your bones.
Muscle massage: Plastic core and foam padding roll along the muscles surrounding your spine to loosen knots.