Thermo-Guard’S Mc02300 Royal Blue Cooling Neck Wrap Cools The Major Pulse Points Found In The Neck While Also Protecting The Back Of The Neck From Sunburn. Activate The Mc02300 By Soaking It In Cold Water For 3-5 Minutes. A Black Poplin “Wickable” Fabric Interior Rests Against The Skin To Absorb Perspiration. For An Easy Wear, A Hook And Loop Adjustable Provides Superior Comfort. The Mc02300 Can Be Re-Activated Quickly For Continual Comfort.,