Your ColdKit is designed to be frozen and placed inside the Carry Bag to help keep your foods cool until lunchtime. You should freeze the ColdKit overnight before using – you can freeze the IcePack with or without the fabric Sleeve. Remove the ColdKit from the Carry Bag as soon as it comes home to prevent excess moisture inside the Carry Bag. Wash the Sleeve intermittently to keep it clean – remove the IcePack and launder the Sleeve by hand or in your washing machine. Make sure to thoroughly dry the Sleeve before using again. Wipe clean the IcePack as needed.