the backpack cooler will be full frozen and ready to chill items for hours

Twist yourself around your rivals until their games unravel

Upper Material: Polyester Fabric

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

Responsive cushioning returns energy to your stride

Castelli Light Head Thingy Multifunctional Running the backpack cooler will bePRODUCT 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