The added comfort of the CMG (Cushioned Mouth Grip) is ideal for those who need to hold the whistle in their mouths for an extended period of time

Upper Material: Polyester Fabric

Responsive cushioning returns energy to your stride

The entire bag goes in your freezer overnight (12 hours) to activate its built-in freezable gel

Let Air dry or drip dry

Castelli Light Head Thingy Multifunctional Running The added comfort of thePRODUCT FEATURES 100% polyester jersey for maximum moisture management Seamless continuous tube construction Sublimated graphic Summer weight Protects from the sun's rays or provides a little extra warmth on cool days Weight: 45g Colure : Silver Gray