All stability balls are fully guaranteed and come with a handy pump to inflate the exercise balls.
Most stability balls are great for persons up to 300lbs. The term "stability ball" is only one of several terms that are used to indicate this style of exercise ball. Other familiar terms are "workout" ball, "Swiss" ball, "Fitness" ball etc. Generally these refer to this style of anti-burst ball that inflates for core, abdominal, and other exercises.
This ball can be used for active fitness and passive micro-muscle core engagement.
Made of anti-burst material and designed to be safe for normal use for sitting and workout conditions.