Tide-Rider Sports has distributed Fox 40 Whistles since they were first introduced into the marketplace in 1987. The Fox 40 Classic and Mini Whistles are used worldwide. Officials and referees in high schools, college (NCAA), professional (the NBA, NFL, and CFL) and international sports (FIBA, FIFA, and FINA) have chosen these Fox 40 Whistles because of their ultra shrill tone and extreme reliability.