Fox 40 Referee Whistles
While Fox 40 makes many types of whistles, you the sports official, are in the right place for Fox a 40 referee whistle.
All officials should have a CMG (cushioned mouth grip) whistle. Fingergrip whistles are specific to football. While you won't go wrong with the Classic, the most popular Fox 40 referee whistle, the highly-rated Sonik Blast (these are the loudest) and EPIK (these have an updated look) are nice upgrades.
A word on colors: Black is the standard referee whistle color. white is typically for volleyball and swimming officials. Pink is for breast cancer awareness