All balls, like car tyres, wear out with heavy use - we have balls 5 years old and still performing well. If you use your ball in a commercial environment you may need to upgrade on a regular basis. Our Swiss balls are not indestructible and may be weakened or damaged by sharp objects which may result in the ball deflating. Do not use a Swiss ball that has been damaged. Always keep your activity area clear of sharp objects or corners and check your ball regularly.