Due to the special material of Bounce Ball, the ball skin is applicable tempure 30-35 degrees in summer and 10-15 degrees in winter. This Bounce Ball is a stretch ball, which is better than ordinary balloons, some cases that are not round or inclined to one side do not belong to quality problems. For example, if Bounce Ball is blown up or the installation is broken, the factory will not bear it. You can contact customer service to install the installation process normally. Do not worry.