Players, get your practice on no matter what the temperature you'll have a training ball that is build to any type of weather with the 3 Pack Multi-temperature Hockey Balls by Sidelines Sports. Each ball is built to withstand the effects of grueling weather. The cold weather ball is designed to not crack or break in extreme cold. On the opposite side the hot weather ball with stay strong in extreme heat rather than melting or becoming soft. Practice whenever, wherever you want!