SERIOUS STEEL FITNESS 5" Foam Massage Ball - Deep Tissue Muscle Knot Release Tool - Back, Legs, Shoulders, and More (5" Inch Black Massage Ball)

Got the 5"dia ball. I like to lie back on it on a recliner, and the 3.5dia ball I was using before was sinking into the cushion too much. This 5" ball is the perfect size to push back regardless of the chair cushion. It's light but very firm and seems like a great quality material. Others this size on Amazon were at least $10 more for whatever reason. The price for this one seems more realistic. I mean... it's a ball.

This ball is perfect for recovery! It’s bigger than a lacrosse ball and is perfect for hitting the glutes and hamstrings. I use it every week if not every day. It’s very helpful for releasing tension and breaking up lactic acid specifically for your legs in hard to get areas.

I was hoping to use this to help roll out my back, like a more focused foam roller, but it's a bit too hard to do that comfortably.

It does not have steel on the inside. It’s good value for the money

Product isn't bad. It is basically a foam roller but in a sphere form, which is what I was looking for and the price is good. However, the outside surface does have a tendency to slip/slide on a smooth surface like a floor pr especially carpet or a rug. Also, it does compress and not give a really firm pressure as a result.I'm 230lbs and wanted really, really firm resistance so this didn't work for me. I ended up with one from 4KOR. I was hesitant on keeping that one as it is almost double the price though, but that better suited MY needs.If you don't want a really firm therapy ball this size and will use it with surface it may not slip on, it's great. I don't knock it. It just wasn't for me.

This is a great product, one of my favorite massage tools especially for lower back. Due to its 5-in size, it is able to reach spots in the lumbar most other tools cannot reach. Highly recommended.

Perfect size and just the right amount of firmness. Not too hard that it'll hurt your muscles and not too soft that it won't massage deep tissue.

Just like at the gym. Really gets in and relaxes those muscles.