Most cooling vests are passive, meaning they don't require power. This active vest runs on AA batteries and includes a backpack so it appears to be more portable than most other active vests. But I couldn't find the full weight anywhere. It lists for $500 on Amazon.
http://www.techniche-intl.com/en/cat...sed/index.html
6429B KewlFlow™ Circulatory Cooling Vest with Portable Back Pack
This KewlFlow™ Personal Cooling System is a self-contained highly portable cooling system that utilizes a lightweight vest through which ice-chilled water is circulated for efficient cooling.
• Backpack serves as a source of chilled water for circulation through the KewlFlow™ Cooling Vest and the Backpack has a 2,84 kilograms insulated reservoir that doubles as a hydration pack
• Fits easily under a T-Shirt, Jacket or Leathers, providing cooling comfort in a wide variety of activities while allowing maximum mobility
• A high efficiency battery-powered pump circulates water & ice through the network of 1.25 meters of micro tubing that runs throughout the vest
• Creates a personal cool ‘microclimate’ for up to four hours around the upper body
• Six size-adjustable elastic straps provide a custom fit for a large range of chest & waist sizes, allowing full range of motion
• Backpack has fully adjustable shoulder, waist and sternum straps with quick-snap buckle closures
• Powered by 10 NiMH rechargeable or eight alkaline (single use) AA cells in a quick-change Power Pack for up to eight hours of continuous pump operation
per charge
http://www.techniche-intl.com/en/cat...sed/index.html
6429B KewlFlow™ Circulatory Cooling Vest with Portable Back Pack
This KewlFlow™ Personal Cooling System is a self-contained highly portable cooling system that utilizes a lightweight vest through which ice-chilled water is circulated for efficient cooling.
• Backpack serves as a source of chilled water for circulation through the KewlFlow™ Cooling Vest and the Backpack has a 2,84 kilograms insulated reservoir that doubles as a hydration pack
• Fits easily under a T-Shirt, Jacket or Leathers, providing cooling comfort in a wide variety of activities while allowing maximum mobility
• A high efficiency battery-powered pump circulates water & ice through the network of 1.25 meters of micro tubing that runs throughout the vest
• Creates a personal cool ‘microclimate’ for up to four hours around the upper body
• Six size-adjustable elastic straps provide a custom fit for a large range of chest & waist sizes, allowing full range of motion
• Backpack has fully adjustable shoulder, waist and sternum straps with quick-snap buckle closures
• Powered by 10 NiMH rechargeable or eight alkaline (single use) AA cells in a quick-change Power Pack for up to eight hours of continuous pump operation
per charge