IRZVOPSS Posture Corrector for Men Back Brace Best Fully Adjustable Support Brace | Improves Posture and Provides Lumbar Support | for Lower and Upper (A11)

Just the right firmness for me. You need a smaller size (approx. 3 inch) for stubborn areas or more focused treatment on a specific tight muscle. I have been using this for over 1 month now with good results.

I like the ball but it is not the easiest to use. I think it takes practice and I think I will love it once I get it down.

Works magic with both lower back stiff bone pain and upper back muscle pain.

Best. thing. ever.

Texture is very massaging. Sturdy ball.