The CooldannaŽ is a head and neck tie that provides hours of cooling relief. Soak the CooldannaŽ in cold water for 10 minutes to activate the cooling crystals and wear as a headband, neck tie or hair band to maximize cooling during hot days and activities. Custom prints and designs. Provides hours of cooling relief. Can be reused hundreds of times. Contains non-toxic polymer crystals. 100% Hand Washable Cotton.