Key Features 1. How to use - easy! 1) Freeze the ice packs - about 4 hours. 2) Put 2 ice packs into the pouch. 3) Place the pouch into the hard hat. 2. Set includes: 1 Pouch + 4 Ice packs(Ice pack design could be changed). ice packs and patented anti wet pouch of hard hat cooler 3. Advanced cooling - stronger and longer lasting. 1) Super ice pack - Special gel included and lasts a lot longer. Ice packs are disposable goods and need to be replaced by time. How long? - Totally depends on your using condition! Based on the temperature, ice packs may need to be replaced every 2~4 hours. We provide 2 more packs(total 4) so that you can have a spare set. Make sure freezing the pack completely. This affects the cooling effects significantly. 2) Patented ice pack pouch - can adjust temperature. 3 separate space inside - based on where you put the ice pack, temperature changes. You can choose one you feel most comfortable with. Silver-thread covered for anti condensation. Condensation - This happens when there are significant temperature differences. When you use this ice pad, as time goes by waterdrops will appear in the outside of the ice pack. It’s INEVITABLE. In order to minimize Frost Formation, this pad utilizes the pouch cover which is made with silver-thread. 4. Size Pouch - about 15.5 x 13.5cm (6 x 5.3”) Ice pack - about 12 x 6.5cm (4.7 x 2.5”) 5. About 120g when fully packed. NOT washable. 6. We also have Ice Vest and Ice Bandana which go great with this hard hat cooler. For more great items, check our store! We have UV Arm Sleeves, Ice Vest and many more hard to find cooling gears. Payment We accept Paypal, Moneybookers, Western Union, Wire Transfer. Shipping 1. Buyers outside US MUST contact us first for postage and availability. 2. We'll ship this item within 3~4 business days after receiving payment. 3. You can choose one of the following shipping methods: 1) Registered Air Mail - Usually takes 10~20 BUSINESS days after we ship. 2) Expedited Air Mail(EMS) - Usually takes 5~8 BUSINESS days after we ship. 4. Actual shipping time entirely depends on your country's Customs and postal service. They can hold the item and delay its delivery for SEVERAL months. 5. Buyers are responsible for Customs charges or any taxes. We do not mark an item as a 'Gift' or undervalue its price. Tracking 1. After shipment we email you RR number(Registered Air Mail) or EM number(EMS) for the tracking. 1) Registered Air Mail - Online tracking is NOT available. MUST allow 10 BUSINESS days after it's shipped and CALL your Post Office. 2) Expedited Air Mail(EMS) - Online tracking is available at USPS site. 2. Your item is coming from across the Pacific Ocean. Please allow the above minimum shipping time before you contact us.