Dynapro stability balls are well-suited for heavy use. They can hold a lot of weight and are resistant to being punctured.
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Pro It can hold a lot of weight
The max weight capacity of the ball is 2000 lbs, so you don't have to worry about breaking it, even if you use some free weights for your workout.
Pro It's very durable
The ball is covered with an extra thick PVC coating that protects the ball from being accidentally punctured by a sharp object.
Pro You won't slip during workout
Ridges on the surface of the ball will prevent you from slipping off the ball during exercise.
Pro There are suitable sizes for most people
Anyone from under 5.2" up to 6.3" will be able to size a ball of suitable size.