Seamless Fit: The rubberized tip is designed to easily slip onto any standard metal whistle without difficulty or modification. Lip Protection: The soft rubber material shields lips and teeth from harsh contact with hard metal whistles during use. Durable Design: Constructed from durable rubber that can withstand regular use while still providing comfort and protection. Color Options: Choose from a variety of assorted mix packs, colors, and hues. Easy to Use: Simply slide the flexible rubber tip guard onto any metal whistle in seconds for an instantly more comfortable whistling experience. Cannon Sports whistle tip guards are the essential accessory for any referee, coach or sports official. Made from durable rubber that slips easily over any standard whistle, the tip guard helps protect lips and teeth from uncomfortable contact with hard metal. Whether blowing short bursts on the field or long blasts at a game, the comfortable barrier lets you whistle with ease and focus on the action. Available in a variety of colors like black, red, blue, white, yellow, green, purple, and pink, there's an option to match any uniform. At under an inch long, the compact guard stores easily on a keychain between uses. Extend the life of your whistle and safeguard your smile with this painless performance booster.