Zan Headgear Cooldanna Paisley Black DC101. To activate the cooling crystals simply soak your Zan Cooldanna in cold water for approximately 10 minutes and your good to go. Use as many times as you need. For on-the-go use place your Zan Headgear Cool Danna in a zip lock bag and add water. Cooldannas from Zan Headgear also come in a wide various prints and designs to suit your lifestyle. Specifications for Zan Headgear CoolDanna Headbands: Manufacturer: Zan Headgear Gender: Unisex Age Group: Adults Fabric/Material: Cotton Application: General Adjustability: Adjustable Water Resistance Level: Waterproof Unisex Size: One Size Length: 8 in Features of ZanHeadgear Cool Danna Bandannas: Custom prints and designs Contains non-toxic polymer crystals Hand washable 100percent cotton Can be reused multiple times Zip-lock bag included for on-the-go use Package Contents: Zan Headgear CoolDanna Bandanna Zan Headgear Cooldanna Paisley Black DC101