The innovative design and high-quality fabric of the BCB Neck cooling scarf multifunctional heat stroke first aid band make it an essential item for outdoor enthusiasts. The secret to the invigorating coolness of the BCB Brand Neck cooling scarf lies in its cutting-edge technology. It should be soaked in water for approximately 15-25 minutes allowing the polycrystals to absorb and retain a large volume of water. The water absorption and retention capability of the fabric help reduce the body temperature. When worn, the retained water evaporates and draws away body heat creating a cooling effect. The "Cooling" effect is increased by refrigeration. (but not required to still be highly effective). Also, this scarf can be used in multiple ways, the multifunctional design allows you to use it as a bandana, headband, or even a wristband.