The COREGEOUS BALL is an inflatable air-filled sponge ball with a unique soft-stretchy "skin" that is used to massage and activate your core and stretch your psoas. This special tool allows you to gently and safely access your innermost abdominals. (approx. 20" round in circumference - sizes will vary) ON-DEMAND PAIN RELIEF: Pain relief can often start with an abdominal massage, and the proper tool can help activate this relief. The Coregeous Ball helps access deep abdominal layers, assisting to stimulate digestion, relax muscles and open up key respiratory function. ALLEVIATE STRESS & TENSION: The Coregeous Ball puts the power of healing back in your hands. Consistent use can help alleviate stress and tension throughout your body by stimulating the vegus nerve. IMPROVED MOBILITY & PERFORMANCE: Whether you are a runner, cyclist, CrossFitter, yoga enthusiast, frequent traveler or stay at home mom, you can benefit from improved mobility and performance with quicker muscles recovery times and injury prevention. PORTABLE & PRACTICAL: Great for gym, home or travel use, the Coregeous Ball is your portable solution to pain relief. It is deflatable, lightweight & can fit in your car, purse, briefcase or anywhere you need a little on-demand pain relief.