Balls are generally shipped inflated. If you need to add more air, avoid putting pressure on the valve and slightly moisten the needle. Never use a stick pump, as this could push the valve into the ball (this is not a valid reason for a claim). Please use a helmet or hand pump with a flexible hose on the needle or an electric pump. Additionally, if you overinflate the ball causing the seams to tear, this will not be covered under warranty.